And on Wednesday, Washington Post opinion writer Greg Sargent pointed out what he said was a pattern: Many of Trump's angriest tweets are often directed at black people.

Sargent said he believes it's a form of race-baiting that plays into some Trump supporters' belief that minorities get special privileges at the expense of white people.

"It is true that in some of these cases, Trump was attacked or at least criticized first," he wrote. "But it’s hard to avoid noticing a gratuitously ugly pattern in Trump’s responses, in which Trump vaguely suggests either that his targets are getting above their station, or that they’re asking for too much and are insufficiently thankful for all that has been done for them."