Reagan-Republicans know or should know that the current #1 problem is elimination of the Islamaniac threat to Western Civilization. Their support will be conditioned upon a candidate's willingness and ability to continue that fight.
Reaganism was essentially fighting the Nation's primary enemy and tax cuts. Anything else was subject to compromise.
America is not a conservative nation and will not support an extreme conservative program. We must make do with what is really out there and disabuse ourselves of the belief that the rest of the nation agrees with us.
Immigration was ROUNDLY rejected by the voter as a major issue when power was handed over to those who planned, organized, manned and lead massive demonstrations of Illegals last fall. Harshly anti-Illegal candidates were creamed in the last election. Anyone still believing that is a winning issue is deluding themselves.
It will be an interesting debate. It sounds as though you've been listening to Grover Norquist; I think all that bowing down to east going on in his household may be effecting him.