These long riffs mocking trans athletes were received with thunderous applause. The only other objects of derision that tickled the crowd with similar enthusiasm were mentions of undocumented immigrants or Cheney and the appearance of House Minority Leader KEVIN MCCARTHY, who was booed when he showed up in a video at the rally.

Trump is wrong that he’s the only one in politics caricaturing trans people for political benefit. Transgender women have been allowed to compete in women’s categories in the Olympics since 2003 and the NCAA since 2010. Yet Republicans say new laws are needed to protect women’s sports and GOP candidates have been using Trump-like language in campaigns and policy around the country for years.

It’s having an impact. Here in Wyoming last week, a local school board voted to remove sexual orientation and gender identity from its non-discrimination code.

Trump is like a standup comedian. He uses rallies, especially in the offseason, to work on material. He tests the reaction among his diehard fans and watches the mainstream media’s coverage. He then rewrites the lines, calibrating them for maximum effect inside the arena and minimal blowback outside of it. You can tell he believes he’s onto something with his mocking of trans people.