Larison battles with Ambers over the meaning of the adjective:

[T]here is something that makes Romney less trustworthy than most, and this is the earnestness with which he embraces his new positions, as if he thinks he has outsmarted his audience and made us forget that he believed the opposite just five seconds before. Romney is probably the only politician who could make me have respect for Rudy Giuliani by comparison. Giuliani at least believes what he believes and isn’t interested in changing that for a few votes.