With his former vice president sidelined by that near-death experience on Jan. 6, former President Donald Trump had to name a new running mate at the recent Republican National Convention. But his campaign had scarcely announced the selection of J.D. Vance, the very junior senator from Ohio, before they began to feel pangs of regret. Not only did Vance embody certain of the most unattractive aspects of MAGA — the Trump pseudo-ideology that highlights the bigotry and misogyny of its standard-bearer — but he instantly found ways to display his ugliest impulses. For instance, despite whispered …