At what point will the Republican leadership have the guts to denounce their own homegrown demagogue?

In an interview with a local Ohio television station on Monday, Donald Trump said that Khizr Khan was really bothered by his position on border security — specifically his promise to keep radical Islamic terrorists from entering the country. [...] When the interviewer brought up Trump’s position on border security, Trump said, “It’s a very big subject for me. And border security’s very big. And when you have radical Islamic terrorists probably all over the place, we’re allowing them to come in by the thousands and thousands. And I think that’s what bothered Mr. Khan more than anything else.”

Vile doesn’t begin to describe the slurs Donald Trump is throwing against a Gold Star father. But give him time and twitter … odds are, he’ll come up with something even worse. And odds are, the Republican leadership will remain silent.