I have little to no doubt that GOP elected officials would rally against Hitlary from day one. I have no assurance of that if Trump was the guy and his plans are just as dangerous and terrible as hers.
You'd think so, huh?
It didn't quite work out that way for the last 8 years, with the furthest left, most America hating, enemy courting, ally bashing president in our history, in power.
The GOP elected officials didn't do jack to rally against him. On the contrary, they HELPED him accomplish many, many, non-conservative goals.
Trump just wants to be president. He doesn't know 5h!+ from shinola as far as conservative ideology, but he love's America and has a group of advisors who will pull him aside occasionally and clue him in to what is conservative and what is not.
Hillary, on the other hand, is a true-believing, America hating, communist.
I'll take my chances with Trump.