Undecided voters: Joe Biden won

Biden took a 50-31 win in CBS's snap poll of uncommitted voters and a 5-1 win in this NBC focus group.

Last night, Joe Biden said Mitt Romney was wrong to dismiss the 47%, said Paul Ryan was wrong to put his personal faith above women's right to control their own bodies, said the middle-class, not the wealthy, deserve a tax break, and said it's irresponsible and reckless to push for more war in the Middle East. Biden even dared to correct Paul Ryan when Paul Ryan's assertions deviated from reality—and he did it with flair.

Biden delivered the kind of performance that thrilled Democrats—and enraged Republicans, who were torn between blaming Martha Raddatz and the expressions on Joe Biden's face. But as amusing as the GOP's spin may be, it doesn't matter. Democrats needed a strong performance from Joe Biden, and they got it.

And among the voters who count—uncommitted and undecided voters—Biden won, both in a CBS snap poll of uncommitted voters who watched the debate and in an NBC focus group of undecided voters in Virginia. So last night was a good night. Democrats got what they wanted and Republicans didn't.