Donald Trump’s victory splintered the already fractured Never Trump movement into shards and further boxed out his MAGA outcasts, leaving some of his most prominent Republican critics scrambling for relevance in a reordered GOP. In recent days, former U.N. Ambassador Nikki Haley ripped into two of the president-elect’s top appointees, Tulsi Gabbard and Robert F. Kennedy Jr., on her radio show. Former Virginia Rep. Barbara Comstock skewered Trump’s nominees as a Cabinet of “Putinists and pedophiles.” And former Vice President Mike Pence attempted to rally anti-abortion conservatives against Kennedy as Trump’s Health and Human Services secretary. Trump’s convincing win allowed...