Donald Trump promised to be America's dealmaker in chief.
"We need a leader that wrote 'The Art of the Deal,'" he said in the speech announcing his candidacy. "I'm a negotiator. I've done very well over the years through negotiation," he said during a Republican debate. "That's what I do, is deals," he said in May. "I know deals, I think, better than anybody knows deals."
But so far, Mr. Trump has made no deals at all, and the ones he thinks he's made have unraveled.
He has no deal with North Korea. Following his June 12 summit with Kim Jong Un, Mr. Trump declared on Twitter that "there is no longer a nuclear threat" from...