For more than two years, Donald Trump has been keeping all of us media folk humble by disproving our reports of his imminent political demise. Is he doing it again?

This column thinks the President botched his Tuesday press conference and his week doesn’t seem to have gotten much better in the days since. Friday brought news of the departure of aide Steve Bannon, but this is unlikely to make most journalists change their negative opinion of Mr. Trump. Yet amid the standard media condemnation of the President—which he occasionally...