Nominating Donald Trump would be an electoral disaster. He's even turning bright red states like Utah blue!
The Donald would lose Utah to either Hillary or Bernie. Recent polls have shown that either Trump or Ted Cruz would also lose Pennsylvania and Ohio to Clinton; Kasich would carry both.
Meanwhile, the latest word is that talk of a conservative alternative to Trump on the ballot this Fall is waning. It appears that if The Donald is nominated nearly a third of the Republican party will be effectively disenfranchised.