that sounds terrible but probably true :(They never would, because that unshakable 30-35% cohort of deplorables keeping them in power couldn't care less about Mike Pence.
Whether they like it or not, the GOP is the party of Trump, and whatever turnout, legitimacy, or money they're hoping for go with him.
(Also, they're all caught up in the NRA's tendrils, and by proxy Russia, but that's a scandal for another day)