Do republicans care anymore? Maybe they feel that as long as they hold onto the 35-39 percent of (white) voters that they'll successfully obstruct democrats until power swings their way again in the mid 2020s? I honestly don't know.
It feels like the GOP has all but given up trying to win over voters outside of their Fox News/Conspiracy filled bubble. I suppose that it makes sense as oligarchy money from the Kochs, Adelson, Mercers, etc fueled by tax cuts and deregulation keeps the party well funded. And as long as they can successfully obstruct democrats and control enough state legislatures, they can continue to roll back the advances of the past century and continue to turn America into a kleptocracy.