Probably “a senior official familiar with the President’s game said” (for fuck’s sake, this source is absolutely Trump himself; did anyone ever really worry about the quality of Obama’s game?):

Trump frustrated aides this summer by forcing a trip to his Scottish golf course. He often talks golf in Oval Office meetings & watches in the White House dining room. He calls pro players and asks for tips. And he’s a speedy — and rather talented player. https://t.co/QS76pya0iz

— Josh Dawsey (@jdawsey1) February 3, 2019