If McCain supports Trump, that is even more reason for pause vis a vis THE DONALD. We should learn from McCain, but he is not the man I want for the nomination.
I think what McCain was doing was simply recognizing that Trump has absolutely ruled in this race, since three weeks after he joined. Every single poll.
He tried to endorse a bunch of other weenies, but Trump is in charge.
You know he would be all over Trump, bashing him with gusto, if he were the slightest bit vulnerable.