It was no coincidence that Donald Trump scheduled a trip to Britain, purportedly to inspect one of his golf courses in Scotland, on June 23, 2016. That was the day of the Brexit referendum, in which 52 percent of the electorate — 17.4 million voters — voted for their nation to leave the European Union.

Candidate Trump’s earlier endorsement of Brexit was criticized by elevated opinion as an unfriendly interference in another nation’s internal affairs. Few if any of the scoffers had similarly criticized former President Barack Obama for urging Britons to vote “remain,” even threatening that if they voted “leave” they would go “to the back of the queue” in seeking a free trade deal with the United States.