When I pressed him on why DeSantis seems so publicly fixated on the MAGA wing of the GOP, Cox was charitable. “It’s a really tough party right now,” he said. “No one else has figured out how to unify and bring the party together. [DeSantis] has clearly made the calculation he needs to be a good alternative for Trump diehard voters out there.” The assumption, other top Republicans say, is that more moderate Republicans like Cox will fall in line with DeSantis because the alternative is Trump. I’m less convinced of that, at least for now. DeSantis may have to...