Jeffrey Anderson writing in the New York Post has some astonishing stats on Democrats who voted against Obamacare as opposed to those who voted for it:

The evidence is clear. Look at House districts where you'd expect a Democrat to be vulnerable -- districts that, based on results in the last three presidential elections, lean Republican or lean Democratic by no more than 5 percentage points. In 48 such districts where polls are available, a Democrat is running for re-election.

Based on the Real Clear Politics averages for those polls, Democrats who voted against ObamaCare are now ahead in 10 of 15 races (leading by an average of 5.5 percentage points) while Democrats who voted for ObamaCare lead in just 9 of 33 races (losing by an average of 2.5 points).

So even though more than twice as many pro-ObamaCare Democrats are running in these districts, more anti-ObamaCare Democrats are winning.

And that's even though Democrats who opposed ObamaCare are running where it's much harder for a Democrat to win. Among these 48, the Dems who voted for ObamaCare are running in districts that are far friendlier, averaging only +4 Republican, while the average anti-ObamaCare Democrat faces a district that's +13 Republican.