Still early, but lawmakers have a right to be worried about how their vote will affect reelection chances this fall. From just-released WSJ/NBC News poll:

Asked if their representative were to vote with Republicans to ditch the current health care overhaul bill, 31% said they would be more likely to vote for him or her in November while 34% said they'd be less likely and 34% said it wouldn't matter. The poll, which comes out later today, also asked voters how they would feel if their representative voted with Democrats to pass the bill, and 28% said they'd be more likely to vote for him or her. On the other hand, 36% said they'd be less likely, and 34% said there would be no difference.