Our default assumption, particularly in the House, should be that they're doing what they think will give them the best chance of being re-elected. (Of course t

Our default assumption, particularly in the House, should be that they're doing what they think will give them the best chance of being re-elected. (Of course they may or may not be correct about that.) So their main concern is just being on "the right side" of the issue, rather than necessarily having any actual impact.