Unfortunately, their only interest is in re-election. What might mean something (although also just a move to improve re-election) is for some of them to come out and say something on the order of "I have been a life-long Democrat and believed the policies of the Democratic party were what were best for the country, however, I have seen the party drift too far left over the past few years (it's been more than a few, but they would need to say "few", so not to look like complete hypocrites) and believe that the policies of the current Republican party are what are best for our country, and therefore, I am leaving the Democratic party to become a _________ (Republican or Independent).