What it actually means for all voters in November is completely debatable, but I don't see KY as being anywhere remotely close this election cycle, even if a ton of evangelicals stay home, coal country decides to put some clothespins on their noses and not completely abandon the Democratic Party because Trump is scary with a finger on the bomb, etc....
Problem for Trump is, I don't see any support for him on the ground (other than one Tea Party member who yelled to the police because some teenagers ripped down his Trump sign).