Just accept that Hillary or Biden will be POTUS, and hope that Trump does not take down two many Pubs in Congress with him.
You mean that we should accept that Hillary will be POTUS or that the RNC should accept Hillary will win the election if Trump gets nominated? Perhaps that would be the best long term solution, if Trump loses in a landslide people might go for a more electable nominee next cycle and I am sure Hillary will be vulnerable in 2020. 12 years of 1 party rule, very polarizing and rather old incumbent and perhaps even an economic meltdown during her watch. And if the RNC just denies Trump the nomination while he won enough delegates it will make for a lot of bad press. They should just let Trump get the nomination and prepare for 2020 or find a more subtle way to get Trump out. I wonder what Romney is thinking right now, even though he isn't the ideal candidate he probably would be doing better than Jeb.