Bill Clinton's comments may have been the tipping point. Yesterday, the former president told an interviewer that the White House should keep its promise and honor its commitment on Obama's infamous "keep your plan" pledge. And if there's one person on planet earth whose reputation for honoring both the truth and personal commitments is -- ahem -- unimpeachable, it's him. Snark aside, Clinton's remarks were hugely impactful; not because he was expressing his own personal opinion, but because in doing so, he was extending a tacit permission slip to fellow Democrats. Message: It's okay to abandon Obama by starting to...