But your last point, about leadership, is most apt. So long as no Republican has the balls to finally stand up and tell the TRUTH about Donald Trump, there is nobody in the conference who has any legitimate claim to leadership.
This is a party in desperate need of a complete tear-down and rebuild. Every once in a while, in politics, that moment comes, when (despite the polls) voters do something decisive and toss a lot of them out. An example is here, in Ontario, where our Liberal Party was tossed as governing party after over 15 years of rule, and reduced to having to few seats to even be recognized as an "official party." That's a real landslide, going from a majority of 58 seats in the legislature to just 7.
I don't know whether that is even possible in the US. Does anybody know what the biggest rout in US history has been?