There were 64 million Republican voters and 69 Democrat voters. The way you win is by drawing them out to vote for you ~ not to vote for the other guy.
This last election Obama lost enough of his 2008 Democrat voters that someone pulling in the Bush Republican voters from 2004 would have won easily.
As a standard thing here on FR we should have an automated caveat dropped down on any post that uses the terms 'undecided', 'moderate' or 'independent' that says DOES NOT EXIST ~ AN ILLUSION INDULGED IN BY POLITICIANS WITH NO GOOD IDEAS
Another good point. Anybody who even remotely claimed to be "undecided" was simply doing it for the attention. "Undecided" in most cases meant they didn't have a party affiliation (independents, in other words) or hadn't voted for an election or two. But they all knew who they were going to vote for, and generally, I'm sure it was the Democrat.
We need to get voters who actually are interested in our program, and to do that, we need to get candidates who believe in it. I did do my duty and vote for Romney, simply because you have to realize that even if the candidate is lame, even his appointments as president would be better than those of the raving Marxist Muslim freak who is now occupying the WH. But most of the GOP didn't even bother.