The new-found senate comity lasted less than 48 hours before the Democrats voted almost unanimously to prevent John Bolton from receiving a confirmation vote on his appointment to the post of ambassador to the U.N. Four of the seven Democratic senators who agreed not to employ a filibuster unless there were "extraordinary circumstances" have chosen nevertheless to invoke a filibuster on the Bolton nomination.
It's true that the filibuster compromise only applied to judicial nominations, but the whole deal was predicated upon good will and trust in the other side's willingness to abide by the spirit of the agreement. It seems that a lot of the air has leaked out of the spirit of the agreement in the last two days.
Senator Frist is no doubt feeling vindicated; Senator McCain has egg on his face. Senator McCain better get used to it. This surely won't be the last time his Democratic friends let him down.