The Dems KNOW these numbers are cooked, and yet they're making strategy as if they're genuine, a recipe for disaster.
How long have they been doing this? I have only been paying attention to the polls since just before the 2000 general election and this has been the MO on polling since then. The donks lost every one of those elections.
First rule: never believe your own PR.
Second rule: manipulation results in lack of credibility.
With the internet, political statisticians can interpret the polling methodology and explain it clearly to the rest of us. Let the donks believe the polls. They will stay home and we will vote.