Post-Thursday’s debate, many people were speculating about Megyn Kelly’s conduct as moderator, and offered up a lot of criticism. And no one was more upset about Megyn Kelly than Donald Trump.

https://twitter.com/realDonaldTrump/status/629555367362605056

I really enjoyed the debate tonight even though the @FoxNews trio, especially @megynkelly, was not very good or professional!

— Donald J. Trump (@realDonaldTrump) August 7, 2015

"@stinger_inc: @realDonaldTrump @megynkelly's behaviour at the #GOPDebate was astonishingly biased."

— Donald J. Trump (@realDonaldTrump) August 7, 2015

You get the idea. But Trump is supposedly the front runner, so he’s supposed to be able to handle a hostile media. And Megyn Kelly’s an adult, so she can handle Twitter critics.

And then Trump just got nasty.