I’ve seen it asserted over and over that the Republican establishment hates Trump and Cruz, mostly because they’re harder to control and their style is predicted to do poorly in the general election for both themselves and others in the party.
But there’s a non-zero chance one of them will be the nominee. What exactly will the party do then? I can’t think of a similar situation in modern times off the top of my head. Do they concentrate on the House and Senate, and let the Presidential candidate sink or swim on his own? How much do they help, or maybe even hinder?