The problem is that anti-globalist, pro-America church-going regular folks, who don't necessarily think of themselves as Republicans or conservatives, will not vote for someone else. I really do fear the GOP cannot win a national election anymore.
OTOH Kasich said the same thing in 2016, and if we continue to go in the direction we are going, by the time 2024 rolls around the antipathy toward Biden may be sufficient that whoever gets the nomination will win.