A brilliant thinker like Elizabeth Warren would be copacetic if electability weren’t Criterion #1, but the best anti-Trump defense would be, yes, exactly what some have already called for: a Joe Biden-Kamala Harris ticket. How might this and other actions unify the Democrats before it’s too late? What follows is in the realm of “could and should” rather than “will.” But an old Biden friend just may be reading this column—I won’t go into the details—and I fervently hope she passes it on to him.