Donald Trump has turned on Lt. Gov. Mark Robinson of North Carolina. Axios reports that while Trump once lavished praise on the gubernatorial candidate, calling him “one of the great leaders in our country,” he now wants voters to forget he had anything to do with Robinson. The assumption across the political media is that Robinson — who has a long history of overt misogyny, loudmouthed racism, and even Holocaust denial — has become too toxic for Trump. “Trump is being weighed down by a very unpopular Republican candidate for governor,” Mick Mulvaney, Trump’s former chief of staff, told NewsNation a month ago. Republicans made…