For a man of so many words, Mr. Trump still has relatively little to say about the kinds of policies he would pursue as president.

Even as he seeks to give his presidential campaign the kind of serious agenda befitting a candidate who is leading in the polls, so far the Trump Doctrine is not much more than this: “Trust me.”…

“When you’re dealing, and that’s what I am, I’m a dealer,” he said when he called a New York Times reporter after the speech. “You don’t go in with plans. You go in with a certain flexibility. And you sort of wheel and deal.”

Demands for greater clarity on what his priorities in office would be have grown louder as he has risen in the polls.

At one point in his 50-minute speech on Tuesday night, someone from the crowd shouted, “So how do you fix it?”