I have to disagree with you here. Most of the Senators from the GOP have been happy to share the same drivel. Indeed, Senator JD Vance and Donald Trump — arguably the most powerful men in the GOP are as unhinged as MTG.
I predict that if Trump does not get elected, the GOP will completely drop his name and they will act as though he never existed.
He is truly insane. It is unbelievable to me that the mainstream GOP - who I have always perceived as reasonable people - would back him with such loyalty. But, then again, due to his previous presidency he probably has the best odds.