Cameron’s Mar-a-Lago lobbying may not be enough to reach the new Republican party

Whatever happened at Mar-a-Lago between David Cameron and Donald Trump on Monday night, was clearly going to stay in Mar-a-Lago.

Dinner at the Trump Florida residence was always going to be a stiff test of the UK foreign secretary’s influence over the former president, presidential candidate, and the man he had previously referred to variously as protectionist, xenophobic, and misogynistic.

When Cameron was planning this week’s trip to…