Trump, who was sucking down Diet Cokes and chomping on a Hershey’s chocolate bar, seemed pumped up. “This is historical,” he kept saying. Finally, he summoned an official White House photographer to record the moment, then got into a discussion about how he should pose. “I should be reading something,” he said. “I can be reading Jeff’s letter.” Mike Pence arrived. “Mike,” Trump said, “this is a historic moment.” Historic, yes; well-planned, no.

