What would happen to the Republicans after Donald Trump? That has been one of the pundits’ favorite themes in the past few months. Maybe the GOP could run against Joe Biden’s massive spending and borrowing splurge, some pondered; or go after some low-hanging woke excesses on the left; or exploit the huge influx of illegal immigrants at the southern border that Biden is bringing about so swiftly; or warn of inflation, or the generosity of pandemic relief holding back the recovery; or find some new young faces to appeal to minorities who moved ever so slightly to the right in...