The GOP will never again win a national election, simply because the electoral numbers are against them. The Dims have more than 2/3 of the required 270 without lifting a finger, because they have an absolute lock on those states, and the GOP has no chance at all of making any inroads there. Hell, the Dims can nominate and run a rancid turd and they are guaranteed that 2/3.
That's not why.
The reason why is that they refuse to stand for anything.