Donald Trump has mastered the authoritarian act, and that’s how he attracted his brigade of humble followers. Some on the left seem to envy this ability to force obedience through threats and attacks. But that approach doesn’t work on issue-oriented voters, doubly so on matters requiring nuance. Abortion is one such issue. Thus, one cannot fathom the ongoing crusade by abortion rights activists to crush Heath Mello, a moderate Democrat running for mayor of Omaha.