And look at this. Obama and Clinton both voted against the proposals: they know which side the nomination is buttered on.
Eli Stephens of LeftI, made a spot-on comment at on the above linked Tomb post -
As far as Clinton and Obama, the interesting thing is that both waited until the bill had already passed (that is, until enough Senators had voted "yes" to ensure its passage) before voting no. Not that there was much doubt that it was going to pass, but on the off chance that it was going to be close, it's quite possible that one or both was prepared to vote "yes" if necessary. This is standard operating procedure in the U.S. Congress. Vote for your constituents when it doesn't matter, vote for the ruling class interests when it does.