Seven months ago, I wrote a column explaining that my increasing irritation with Mitt Romney had made me understand how Republicans probably felt about Al Gore 12 years ago. The politician with the "authenticity" problem whose goals you share just seems awkward—undesirable from a strategic perspective, but hardly morally blameworthy—while the one from the other party seems irredeemably phony and dishonest. But I'm guessing lots of liberals, maybe most, feel the way I do, which is that is seems I like this guy less and less every day. This has happened before. Before John McCain's 2008 presidential campaign, he seemed like a fairly reasonable person for a Republican, extremely conservative to be sure, but with an admirable willingness to buck his party every now and again and a refreshing honesty. But by the end of the race, I couldn't stand him, and I'm sure most liberals felt the same way. He had revealed himself to be unprincipled, petty, mean, and a whole bunch of other things. I...