The attacks — delivered in Trump’s distinctive and belittling style — would no longer appear to be in his best interest now that the primary campaign is over and he faces a tough and well-funded opponent in Clinton. They could also further undercut his standing among women and minorities, who are strongly opposed to him in public-opinion polls…

Trump’s allies have rejected the idea that he will be unable to unite the party’s establishment. They note that many members of Congress and other elected Republicans have backed Trump since he emerged as the presumptive nominee.

“I understand that Paul Ryan is trying to have it both ways,” Mark Burns, an evangelical pastor and television evangelist from South Carolina who frequently speaks at Trump’s rallies, said at the Anaheim rally. “Donald Trump is going to unite this party and, come November, we’re going to elect a new president by the name of President Donald Trump.”