Posted on 05/06/2004 2:45:03 AM PDT by Dales
The current score in the ECB is Bush 206, Kerry 193. When tossups are factored in, Bush extends his lead slightly to 248-228. ECB Classic gives some grist to those who claim I am biased, as the raw score has Kerry leading 203-196. My bias cannot be too bad, though, since with the tossups Bush goes over the magic 270, leading 273-238.
Background: I got the *BLEEP* kicked out of me in Wisconsin. Oh wait, sorry. Stripes flashback. Reagan won here twice. Nixon won here three times. LBJ and Carter (against Ford) won here, and then the Democrats have taken the last four elections here. The first of Clinton's wins would have been a loss for him without Perot.
Polling Data:
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| Date | Polling Company | Link | Type | MOE | Republican | Democrat | Margin | ||
|---|---|---|---|---|---|---|---|---|---|
| 5/03 | Badger Poll | Link | Adults | 4% | Bush | 53% | Unnamed Democrat | 42% | Bush +11 |
| 10/28/03 | Badger Poll | Link | Adults | 4% | Bush | 46% | Unnamed Democrat | 45% | Bush +1 |
| 1/27/04 | Badger Poll | Link | Adults | 4% | Bush | 38% | Unnamed Democrat | 54% | Dem +16 |
| 3/24/04 | American Research Group | Link | 600 LV | 4% | Bush | 43% | Unnamed Democrat | 46% | Kerry +3 |
| 3/31/04 | Badger Poll | Link | 500 Adults, Nader not an option | 4% | Bush | 47% | Kerry | 41% | Bush +6 |
| 3/31/04 | Badger Poll | Link | 500 Adults, Nader an option | 4% | Bush | 49% | Kerry | 45% | Bush +4 |
| 4/21/04 | Wisconsin Public Radio / St. Norbert College Survey Center | Link | 358 RV | 5% | Bush | 42% | Kerry | 49% | Kerry +7 |
| 4/28/04 | Rasmussen | Link | 500 LV, Nader not an option | 4.5% | Bush | 42% | Kerry | 50% | Kerry +8 |
| 4/28/04 | Rasmussen | Link | 500 LV, Nader an option | 4.5% | Bush | 41% | Kerry | 45% | Kerry +4 |
| 4/28/04 | Badger Poll | Link | 511 Adults | 4.5% | Bush | 50% | Kerry | 38% | Bush +12 |
Punditry: My, oh my. The Badger Poll sure muddies the waters here, making it much harder to draw a conclusion on the actual state of the race in Wisconsin. While I am discounting the Wisconsin Public Radio poll for the reasons specified below (namely, there is no way that 90% of the randomly called adults were registered voters), that still leaves two polls with quite opposite results. Further, both of these pollsters have shown a propensity for accuracy in Wisconsin. As early as September of 2000, Rasmussen was showing Bush and Gore as compeletly neck and neck. In 2002, the Badger Poll had the Gubernatorial race nailed down. Without more information, I have no reason to trust one over the other. Tossup.
Addendum: A comment was made to me which suggested that I was not treating the Badger Poll and the Wisconsin Public Radio polls equally, despite the fact that both were polls of "adults". Guilty as charged! The reasons I give one more credence than the other are:
Background: Since Harry Truman, only Bill Clinton (during his re-elect) has carried the Grand Canyon State for the Democrats. Clinton also made it close with the help of Perot in 1992. Other than that, things have been surprisingly one-sided. Arizona has 6 of 8 of its Representatives and both of its Senators from the GOP. The GOP also controls both chambers of the state legislature. The top of the executive branch is run by Democrats, with Janet Napolitano being a first term Governor and Terry Goddard being the Attorney General. Most other top executive offices are held by Republicans. Republicans have a 41% to 35% lead in voter registration.
Polling Data:
| Date | Polling Company | Link | Type | MOE | Republican | Democrat | Margin | ||
|---|---|---|---|---|---|---|---|---|---|
| 7/18/03 | Behavior Research Center | Link | 701 Adults | 4.3% | Bush | 55% | Unnamed Opponent | 41% | Bush +14 |
| 1/11/04 | Behavior Research Center | Link | 641 Adults | 3.9% | Bush | 50% | Highest Ranking Democrat (Dean) | 38% | Bush +12 |
| 2/19/04 | SurveyUSA | Link | RV | 4.3% | Bush | 52% | Kerry | 44% | Bush +8 |
| 2/22/04 | Arizona State University | Link | 430 RV | 4% | Bush | 44% | Kerry | 46% | Dem +2 |
| 3/18/04 | Survey USA | Link | 634 LV | 4.0% | Bush | 51% | Kerry | 42% | Bush +9 |
| 4/26/04 | Arizona State University | Link | 410 RV | 4.8% | Bush | 41% | Kerry | 38% | Bush +3 |
Punditry: The Arizona State University poll has consistently been more favorable to the Democrats than the SurveyUSA poll has been. Still, it shows the President ahead, which is a change since the last iteration of the ASU survey, back in February. The temptation is to leave the designation unchanged, but to be conservative I will slide it back to Slight Advantage for Bush.
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Connecticut |
|---|---|
| Electoral Votes: 7 | |
| 2000 Result | |
| Gore 56% | |
| Bush 38% |
Background: 3-5-3 in the last 11, with Clinton's first being probably due to the Perot factor.
Polling Data:
| Date | Polling Company | Link | Type | MOE | Republican | Democrat | Margin | ||
|---|---|---|---|---|---|---|---|---|---|
| 3/11/03 | Quinnipiac | Link | RV | 3% | Bush | 37% | Unnamed Democrat | 51% | Dem +14 |
| 7/31/03 | Quinnipiac | Link | RV | 3% | Bush | 37% | Unnamed Democrat | 51% | Dem +14 |
| 2/26/04 | University of Connecticut | Link | 448 RV | 4% | Bush | 36% | Kerry | 49% | Kerry +13 |
| 3/28/04 | University of Connecticut | Link | RV | 4% | Bush | 33% | Kerry | 52% | Kerry +19 |
| 4/27/04 | University of Connecticut | Link | 501 RV | 4% | Bush | 33% | Kerry | 51% | Kerry +18 |
Punditry: Bush gains a point. Impressive.</sarcasm>
Background: Arkansas votes Republican, although if there is a southerner running against a northerner it will go Democrat. Carter beat Ford, and Clinton won twice. Republicans won all the rest since LBJ. Humphrey came in third here, behind Wallace.
Polling Data:
| Date | Polling Company | Link | Type | MOE | Republican | Democrat | Margin | ||
|---|---|---|---|---|---|---|---|---|---|
| 4/8/04 | Arkansas State University | Link | Adults | 5% | Bush | 51% | Kerry | 43% | Bush +8 |
| 4/14/04 | SurveyUSA | Link | 565 RV | 4.2% | Bush | 47% | Kerry | 45% | Bush +2 |
| 5/2/04 | Rasmussen | Link | 500 LV | 4.5% | Bush | 45% | Kerry | 45% | Push |
Punditry: Rasmussen's poll confirms the earlier SurveyUSA poll, showing Arkansas to be firmly in the battleground range. Since two of the last three polls show Bush leading, and this one shows the race tied, I will maintain the categorization of Arkansas as having a Slight Advantage for Bush, which has to be considered a disappointing state of affairs for the Bush campaign at this juncture.
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Oregon |
|---|---|---|---|
| Electoral Votes: 7 | |||
| 2000 Result | |||
| Gore 46.96% | |||
| Bush 46.52% |
Background: The last 10 elections have gone 1-5-4. Without Perot, Clinton would likely have lost his initial run here though. From 1968 on, the only Democrat to break 50% here was Michael Dukakis; Reagan and Nixon each broke 50% in their re-elect.
In early 2000, Oregon was polling strongly for Bush. The left coast influence eventually took hold and turned it into a very even state, and it starts this year as a tossup. Democrats hold 4 out of 5 Representative seats, while the Senate seats are divided, just as control of the state legislative chambers is split. The Democrats hold most of the executive branch positions. Democrats hold a 3% lead in registration, 39%-36%.
Polling Data:
| Date | Polling Company | Link | Type | MOE | Republican | Democrat | Margin | ||
|---|---|---|---|---|---|---|---|---|---|
| 3/5/04 | Hibbits | Link | ? | ? | Bush | 40% | Kerry | 45% | Kerry +5 |
| 4/7/04 | University of Oregon | Link | 440 RV | 4.7% | Bush | 47% | Kerry | 45% | Bush +2 |
| 4/25/04 | Rasmussen | Link | 500 LV | 4.5% | Bush | 45% | Kerry | 46% | Kerry +1 |
| 4/29/04 | Research2000 | Link | 500 LV | 4 | Bush | 46% | Kerry | 48% | Kerry +2 |
Punditry: Three of four Oregon polls agree: Kerry leads Oregon. Four of four agree that it is very close. Slight Advantage for Kerry.
Background: 2-5-3 in the last ten elections. Without Perot, it likely would have been 2-6-2. Since Lyndon Johnson, only Reagan in his re-elect has approached 60%. Michigan has gone from leaning Bush to having a slight advantage for the Democrats. Republicans have 9 of 15 Representatives, Democrats hold both Senate seats, while Republicans hold both houses of the state legislature. The state executive is split; Democrats hold the Governor and Lt. Governor positions while Republicans have the Secretary of State and Attorney General slots.
Michigan has gone from leaning Bush to having a slight advantage for the Democrats. Republicans have 9 of 15 Representatives, Democrats hold both Senate seats, while Republicans hold both houses of the state legislature. The state executive is split; Democrats hold the Governor and Lt. Governor positions while Republicans have the Secretary of State and Attorney General slots.
Polling Data:
| Date | Polling Company | Link | Type | MOE | Republican | Democrat | Margin | ||
|---|---|---|---|---|---|---|---|---|---|
| 5/26/03 | Epic/MRA | Link | 400 RV | 5% | Bush | 48% | Unnamed Democrat | 41% | Bush +7 |
| 9/21/03 | Mitchell Research | Link | 600 LV | 4% | Bush | 44% | Unnamed Democrat | 49% | Dem +5 |
| 12/10/03 | Survey USA | Link | 724 LV | 3.7% | Bush | 53% | Kerry | 43% | Bush +10 |
| 2/3/04 | Survey USA | Link | 724 LV | 3.7% | Bush | 46% | Kerry | 51% | Dem +5 |
| 2/22/04 | Epic/MRA | Link | 600 LV | 4% | Bush | 45% | Kerry | 49% | Dem +4 |
| 3/1/04 | Mitchell | Link | LV | 4% | Bush | 40% | Kerry | 46% | Kerry +6 |
| 3/14/04 | Rasmussen | Link | 500 LV | 4.5% | Bush | 44% | Kerry | 48% | Kerry +4 |
| 3/14/04 | Marketing Resource Group | Link | 600 RV | 4.1% | Bush | 47% | Kerry | 45% | Bush +2 |
| 4/1/04 | Epic/MRA | Link | 600 LV | 4% | Bush | 45% | Kerry | 47% | Kerry +2 |
| 4/4/04 | Survey USA | Link | 536 LV | 4.3% | Bush | 41% | Kerry | 51% | Kerry +10 |
| 5/2/04 | Survey USA | Link | 536 LV | 4.3% | Bush | 43% | Kerry | 47% | Kerry +4 |
Punditry: This result is more along the lines of what we had been seeing previously, and makes the April SurveyUSA poll look a little like an outlier. With four of the last five Michigan polls showing a result within one span of the margin of error, including this most recent one (barely), I am sliding Michigan back into the Slight Advantage for Kerry category.
Background: New Jersey used to be considered a Republican state. Those days have passed, although there are still some signs of life. In the last 10 Presidential elections it has gone 1-6-3 with the Republican wins coming in the middle, the last Clinton win and the Gore win were by such substantial margins that it is hard to avoid the feeling that New Jersey is trending leftward.
If New Jersey remains tight enough to stay in the battleground, it is a case of back to the future. ECB2000 started with it leaning Gore's way. The Democrats have 7 of 13 Representatives and both Senate seats, control both chambers of the state legislature, hold all of the important executive offices, and have a 25%-19% advantage in voter registration.
Polling Data:
| Date | Polling Company | Link | Type | MOE | Republican | Democrat | Margin | ||
|---|---|---|---|---|---|---|---|---|---|
| 9/8/03 | Rutgers | Link | 802 Adults | 3.5% | Bush | 43% | Unnamed Democrat | 35% | Bush +8 |
| 9/15/03 | Fairleigh Dickinson University/Public Mind | Link | 600 RV | 4% | Bush | 36% | Unnamed Democrat | 29% | Bush +7 |
| 9/25/03 | Quinnipiac | Link | RV | 3.1% | Bush | 48% | Kerry | 43% | Bush +5 |
| 11/10/03 | Quinnipiac | Link | 1,027 RV | 3.1% | Bush | 46% | Kerry | 43% | Bush +3 |
| 1/11/04 | Fairleigh Dickinson University/Public Mind | Link | 600 RV | 4% | Bush | 40% | Unnamed Democrat | 32% | Bush +8 |
| 1/13/04 | Rutgers | Link | 823 RV | 4.2% | Bush | 41% | Unnamed Democrat | 38% | Bush +3 |
| 4/10/04 | Fairleigh Dickinson University/Public Mind | Link | 802 RV, Nader not an option | 3.5% | Bush | 47% | Kerry | 48% | Kerry +1 |
| 4/10/04 | Fairleigh Dickinson University/Public Mind | Link | 802 RV, Nader an option | 3.5% | Bush | 48% | Kerry | 44% | Bush +4 |
| 4/20/04 | Rasmussen | Link | 500 LV | 4.5% | Bush | 39% | Kerry | 51% | Kerry +12 |
Punditry: I had assumed that the Rasmussen poll would show Kerry up, and I will use this opportunity to slide New Jersey all the way over to Leaning for Kerry. Still, given the other polls including the FDU one, I would not be surprised in the least if we see another poll out shortly which puts this a bit closer.
Addendum: I am not going to do a full-blown update on New Jersey for this one, but here is a story about a poll taken of Hudson County (New Jersey). Kerry leads Bush 52.3 to 26.4 in a two man comparison.
Hudson County accounted for about 5% of the New Jersey votes cast in the 2000, and Bush took 26.2% of the vote (about what he gets in this poll) while Gore took 70.6% (about 20 points higher than Kerry gets).
Background: Clinton won twice here, and the second time would have been even without Perot. The first time, he likely would have lost.
Johnson won here. Other than that, Republican wins back through Dewey beating Truman. The elder Bush crushed the man who Kerry was Lt. Governor
for, Mike Dukakis.
Both last time and this time, New Hampshire started as a slight advantage for Bush. When looking at the other offices, it is hard to understand just why this state is not more firmly in his control. The Republicans hold all the House seats, both Senate seats, control both chambers of the state legislature, and hold all major executive branch offices, while having a 37%-26% registration advantage.
Polling Data:
| Date | Polling Company | Link | Type | MOE | Republican | Democrat | Margin | ||
|---|---|---|---|---|---|---|---|---|---|
| 4/27/03 | Franklin Pierce College | Link | 600 RV | 4% | Bush | 42% | Unnamed Democrat | 42% | Even |
| 9/11/03 | American Research Group | Link | RV | 4% | Bush | 50% | Unnamed Democrat | 36% | Bush +14 |
| 10/16/03 | Research 2000 | Link | RV | 4% | Bush | 51% | Kerry | 39% | Bush +12 |
| 12/10/03 | American Research Group | NA | RV | 4% | Bush | 50% | Unnamed Democrat | 38% | Bush +12 |
| 10/16/03 | Research 2000 | Link | RV | 4% | Bush | 51% | Kerry | 39% | Bush +12 |
| 1/20/04 | Associated Press | Link | 600 LV | 4% | Bush | 55% | Kerry | 40% | Bush +15 |
| 2/20/04 | University of New Hampshire | Link | 511 LV | 4% | Bush | 38% | Kerry | 53% | Kerry +15 |
| 3/18/04 | American Research Group | Link | 463 RV, Nader an option | 4.6% | Bush | 45% | Kerry | 39% | Bush +6 |
| 3/18/04 | American Research Group | Link | 463 RV, Nader not an option | 4.6% | Bush | 47% | Kerry | 45% | Bush +2 |
| 4/1/04 | American Research Group | Link | 600 LV, Nader an option | 4% | Bush | 48% | Kerry | 43% | Bush +5 |
| 4/1/04 | American Research Group | Link | 600 LV, Nader an option | 4% | Bush | 48% | Kerry | 45% | Bush +3 |
| 4/22/04 | Rasmussen | Link | 500 LV | 4.5% | Bush | 45% | Kerry | 47% | Kerry +2 |
| 4/26/04 | University of New Hampshire | Link | 491 LV | 4.4% | Bush | 45% | Kerry | 49% | Kerry +4 |
Punditry: The UNH poll This has something for each partisan camp to crow about. For Kerry, it shows him leading slightly in a state Bush carried in 2000. For Bush, it shows an 11 point narrowing of the gap since the last University of New Hampshire poll.
There are aspects to this poll which fit in nicely with the ideas I was working into tomorrow's article, so there will be more about it in that writing.
Slight Advantage for Kerry.
Background: Alabama has been a reliable GOP state, only straying twice since 1960; both times it went for a southerner. Jimmy Carter carried the state, as did George Wallace.
Polling Data:
| Date | Polling Company | Link | Type | MOE | Republican | Democrat | Margin | ||
|---|---|---|---|---|---|---|---|---|---|
| 4/27/03 | USA Polling Group | Link | RV | 5% | Bush | 60% | Unnamed Democrat | 30 | Bush +30 |
| 3/18/04 | USA Polling Group | Link | 405 adults | 5% | Bush | 59% | Kerry | 27% | Bush +32 |
| 5/3/04 | SurveyUSA | Link | 743 LV | 3.7% | Bush | 55% | Kerry | 36% | Bush +19 |
Punditry: A little regression towards the mean, but Alabama is still far from a horse race. Safe Bush.
Background: Vermont went for Lyndon Johnson, then not for another Democrat until Bill Clinton. It has gone Democrat the last three elections (by 16, 22, and 10 points). Third party candidates are a factor in Vermont, even if they do not generally swing the state.
Polling Data:
| Date | Polling Company | Link | Type | MOE | Republican | Democrat | Margin | ||
|---|---|---|---|---|---|---|---|---|---|
| 10/02/03 | Research 2000 | Link | 400 LV | 5% | Bush | 38% | Dean | 50% | Dem +12 |
| 5/01/04 | Research 2000 | Link | 400 LV | 5% | Bush | 36% | Kerry | 51% | Kerry +15 |
Punditry: One of the most fun parts to this poll was how seriously the writeup takes it. "Mr. Bush is in trouble in Vermont," intones the pollster, Del Ali of Research2000. Here's a shocker- if Kerry was going to lose Vermont, he was going to lose just about everywhere. Strong Advantage for Kerry.
| Effective National Popular Results: Bush 45.0%, Kerry 44.7% |
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| Kerry E | F Bush | |||||||
|---|---|---|---|---|---|---|---|---|
| Safe | Strong | Lean | Slight | Tossup | Slight | Lean | Strong | Safe |
| DC (3) | DE (3) | MD (10) K48-B43 3/24/04 |
IA (7) K47-B46 4/21/04 |
NM (5) B46-K45 4/1/04 |
AR (6) B45-K45 5/2/04 |
VA (13) B48-WC33 12/3/03 |
SC (8) B52-UD36 7/28/03 |
AK (3) |
| HI (4) | ME (4) K51-B38 3/4/04 |
MN (10) K50-B38 4/2/04 |
OR (7) K48-B46 4/29/04 |
OH (20) B46-K45 4/2/04 |
WV (5) B46-K41 4/15/04 |
GA (15) B47-UD43 2/4/04 |
MS (6) B49-UD29 12/22/03 |
ND (3) |
| RI (4) K53-B31 2/7/04 |
IL (21) K47-B39 3/13/04 |
WA (11) K46-B41 4/5/04 |
MI (17) K47-B43 5/2/04 |
FL (27) B46-K45 4/21/04 |
PA (21) B46-K46 4/25/04 |
NV (5) B49-K38 3/17/04 |
SD (3) B50-UD39 2/5/04 |
NE (5) |
| MA (12) K54-B32 4/5/04 |
CA (55) K53-B41 4/21/04 |
NJ (15) K51-B39 4/16/04 |
NH (4) K49-B45 4/26/04 |
WI (10) K50-B42 B50-K38 4/28/04 |
AZ (10) B41-K38 4/26/04 |
TN (11) B52-K41 3/22/04 |
KY (8) B57-K41 2/16/04 |
WY (3) |
| - | NY (31) K51-B32 4/22/04 |
- | - | - | - | MO (11) B49-K42 3/23/04 |
KS (6) B57-K39 3/4/04 |
MT (3) B52-UD27 5/16/03 |
| - | CT (7) K51-B33 4/27/04 |
- | - | - | - | CO (9) B49-K44 4/14/04 |
IN (11) B52-K37 3/24/04 |
TX (34) B54-K35 3/6/04 |
| - | VT (3) K51-B36 5/1/04 |
- | - | - | - | NC (15) B51-K44 4/1/04 |
OK (7) B47-K35 4/1/04 |
ID (4) B55-K23 3/17/04 |
| - | - | - | - | - | - | - | LA (9) B52-K38 3/28/04 |
UT (5) B66-K24 3/25/04 |
| - | - | - | - | - | - | - | - | AL (9) B55-K36 5/3/04 |
| Totals | ||||||||
| Kerry States | Battleground States | Bush States | ||||||
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| 23 | 124 | 36 | 35 | 62 | 42 | 79 | 58 | 69 |
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| 193 | 112 | 206 | ||||||
Which President was the first one who was born in the United States of America?The answer is Martin Van Buren.
This week's quiz: What aircraft did the Air Force Thunderbirds fly for less than a year?
I like it. Seems like an improvement since the last edition.
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I Wouldn't Touch It With a 10 Foot Poll
Likely Story
Are you a likely voter?Before you answer that question, I want you to notice that I did not ask if you are likely to vote. These are two very different questions. How likely you are to vote is something you can answer on your own, and only you know how accurate an answer it is. But are you a likely voter? To answer this, you would have to know how the designation is defined. And that depends on who is doing the asking. Different polling companies use different methods for drilling down to those most likely to vote, trying to differentiate from the competition with increased accuracy and lower cost. How well a company screens for likely voters can greatly impact the results of a poll.
A good example of this can be found in the recently released University of New Hampshire Granite State Poll. The poll showed Democrat John F. Kerry leading President George W. Bush among likely voters in the state of New Hampshire by 4 percentage points, 49% to 45%. But how likely are the likely voters in this survey to actually vote?
According to the details published by UNH, their survey reached 542 randomly selected adults, including 491 likely voters. Right off the bat, this is an eye-raising metric, for it would mean that 91% of all adults in New Hampshire are likely to vote- not bloody likely. When a poll overstates the percentage of voters who will vote, it introduces a bias into the survey that favors the Democrats. This is because the adults least likely to vote fall into three main demographics: the poor, the young, and minorities. These demographics strongly tend to support Democrats.
Any screening for likely voters should begin by removing those who are not registered. A Gallup validation study (where the organization contacted those who it had earlier polled to check what they did on election day) in 1984 determined that just 2% of those who told pollsters they were not registered ended up voting. In the Granite State poll, 19% of the total adults questioned admitted to not being registered to vote-- 102 of the 542. The percentages indicate that just 2 of these people will end up voting come November. The other 100 will not. But UNH counted 65 of these 102 unregistered adults as likely voters, comprising 13% of their entire likely voter poll. Over one tenth of the results are attributable to people who are 98% certain not to vote. It all depends on the meaning of the word likely. As it happens, this faux pas probably did not impact the horserace results very much as they had Kerry leading by only 1 point among this group, but it shows a weakness in the methodology.
Another place where the likely voter screen shows itself to be lacking is with younger voters. Most estimates put the percentage of adults who are under the age of 35 that actually vote at around 33% (with those under age 25 voting less than 10% of the time). Yet the UNH poll has 104 of the 128 adults under age 35 interviewed categorized as likely to vote-- an 81% clip. And since this age group supports Kerry 2-1, the impact on the head to head numbers is significant. 79% of those earning less than $30K, another demographic, which generally votes in lower percentages, are listed as likely to vote (and support Kerry 3-2).
Take the unlikely likely voters out of the Granite State Poll, and Kerry's lead would not exist.
John Zogby handles the matter of likely voters completely differently. He made his biggest splash in the 1996 election. During the campaign, Zogby's polls had shown Clinton beating Dole by a much smaller margin than any other pollster was measuring. As Chris Mooney reported, "Zogby claimed to remedy the perceived problem of Democratic bias by weighting his data according to a previously determined distribution of party affiliation: 34.5 percent Democrats, 34 percent Republicans." Mr. Zogby predicts a turnout model; he guesses what percentage of the electorate will be Republicans, what percentage of the electorate will be Democrats, and what percentage of the electorate will be everyone else. In essence, he runs three polls and blends them together in the prescribed ratios. This can be deadly accurate when he guesses the turnout rates correctly, as he did in the 1996 campaign. In the 2000 campaign, he foresaw that Democrat turnout was going to be higher than it had been in 1996 and as such during the entire campaign his polls consistently showed Al Gore doing better than most other pollsters. When Gore made a late surge, the other polling companies ended up as accurate.
This method breaks down badly when the predicted turnout model does not pan out. In the 2002 Senate races, Zogby completely underestimated Republican success at getting out the vote (and Tim Johnson's success at getting out the Reservation vote), and the result was blown polls for Colorado, Illinois, Georgia, New Hampshire, and South Dakota. In 1998, Zogby was out on a limb by his lonesome, predicting an Al D'Amato win in New York and a Carol Mosley-Braun win in Illinois. The limb broke.
Gallup (except for the tracking poll they introduced in 2000) and Pew use very similar methods, based upon the Perry-Gallup Likely Voter Index. The Perry-Gallup system works by having the questioner ask respondents a series of 8 questions. For each answered 'correctly', the respondent gets a point. The top 70% of respondents ranked by this score are considered the likely voters. Some of the questions are aimed at how motivated the person is for the coming election: "How much thought have you given to the election" (score a point for "A lot" or "Some"), "Do you plan to vote" (score a point for "Yes"), and "On a scale from 1 to 10, rate your likelihood of voting" (score a point for 7 or higher). Another question is "Do you follow government affairs", with a point being awarded for either "Most of the time" or "Some of the time". Two get at voting history: "How often do you vote" (score a point for "Always", "Nearly", and "Part of the time", and "Did you vote in the previous Presidential election" (score a point if "Yes" and the person can recall the candidate). And the last two get at if the person is going to be able to find the booths: "Do you know where to vote" (score a point for "Yes") and "Have you ever voted in your current district" (score a point for "Yes"). Respondents are automatically coded a zero if they are not registered. Respondents under age 22 are given the three points for past voting behavior, so as to not unfairly punish them.
When making the cut at the top 70%, in practice this means that all of those scoring an 8 will make the cut, and a portion of those scoring a 7. For Gallup, they scale the 7's down to where they make the overall sample be 50% of the total adults interviewed, to match the general turnout rate in most Presidential elections. What about when turnout will exceed 50%? While one might expect that the predictions would be off then, since the model is based on a 50% turnout, in practice the system handles high-turnout races well. The questions which measure voter intensity tend to predict the coming heavy turnout, and as such the side which is more energized ends up taking a higher proportion of the top 70% of respondents. Pew's methods are based on the same concepts and many of the same questions, with some minor modifications.
Then late in 2000's campaign, Gallup threw a curveball. They introduced a daily tracking poll, similar to the ones being done by Zogby and Rasmussen. However, the Gallup Tracking Poll did not use the same screening as the Gallup Poll did. It used a similar method, but with a different set of questions (a 2000 mail mentioned a 7 point scale result, rather than an 8 point one). "We designed this instrument to be sensitive to day-to-day changes, and that's what it is doing," said Gallup's Frank Newport. They got what they designed-- the Gallup Tracking poll was all over the place, showing 20 point swings in a matter of days. On one day, 35% of the likely voter pool would be Republicans. Three days later, it would be 28%. One day, you would be likely. The next day, you would not.
Other pollsters do not specify exactly how they determine who is likely to vote. Rasmussen is one such example. In 2000, his poll showed Bush leading Gore by a considerably larger margin than other pollsters showed, and he did not catch the late movement towards the Vice-President that others did. He has made some changes this year, but exactly what they are is not clear. In an email to Tom Ewall, Mr. Rasmussen admitted that his method is anticipating a high turnout in 2004, and as such is using a looser screen for likely voters.
When examining poll results, it is important to keep in mind that not every likely voter poll is alike. Sometimes, comparing the results produced by one organization to that of another organization is like comparing apples to oranges. And sometimes, the results are no better than a poll of just registered voters or of adults. The savvy poll watcher learns to take every result with a grain of salt, and to avoid the urge to read too much in to any single result, especially when the underlying methods are not fully known and the internal demographics are not presented so that sanity checks can be made.