In a system where the crazy people are running things, everyone suffers, including the crazy people. One of the key Republican strategies up until recently has been to talk up popular-but-insane stances (e.g. on abortion or immigration) without actually achieving them (and thus having to deal with the explosion of suffering and chaos that follows.)
A big contingent of the house GOP has lost touch with that essential reality, I think for the simple reason that losing touch with reality is a key electoral advantage for them where their "base" is concerned. But maybe some senate Republicans are still holding on to some sanity and starting to get worried about the growing monster they've created.