Two things: First, it is impossible for a mentally and emotionally normal adult to support Donald Trump's bid for the presidency without calling into question his judgment or his honor. Second, it is easier to forgive defective judgment than deficient honor. [...]

It would be perfectly defensible -- and honorable -- for Ted Cruz to say: "I made that promise thinking that the chances were remote that Donald Trump would become the nominee, and without fully appreciating what manner of man he was, which really began to dawn on me around the time he suggested my father was somehow mixed up in the assassination of President John F. Kennedy and putting out explicitly racist theories about how Mexican-American judges can't fairly preside over cases involving fraud allegations against Trump. I shouldn't have made that promise, and I regret having done so, but there is no way in hell that I am supporting Trump. I care too much about the future of my country and my immortal soul to climb into that particular snake-pit just to avoid the appearance of having made a mistake in judgment, which I clearly did." [...]

Declining to support Trump is an act of integrity and good taste. It isn't anything Cruz or Bush has done that makes Trump unsupportable -- that is Trump's doing, and no one else's. If there is a revolt in Cleveland -- as there should be -- it will be entirely understandable, and justifiable. If the delegates end up playing fast and loose with the nomination rules, it may be that the Republican party needs some new ones -- the Democratic party and its undemocratic "superdelegate" system sure is looking smart right about now: They didn't need McGovern to tell them twice.