Even if there is a brokered convention it would be suicide for the GOP not to nominate whoever finished first.
Even if they don’t care about the presidency, they still need people to turn out to keep their majority in congress.
You are right...they will sacrifice all the down stream elections, down to the teeniest tiniest community elections as well.....truly, they can’t see past their rage.
Trump has them cornered like a beast fighting for its life.