Rich Lowry, the editor of the conservative magazine National Review, said the Republican presidential front-runner was attacking rival Carly Fiorina because she emasculated him at last week's presidential debate.
"Part of what's going on here is that last debate. Let's be honest: Carly cut his balls off with the precision of a surgeon, and he knows it," Lowry said during a Fox News interview, according to video posted by Mediaite.
Host Megyn Kelly was shocked.
"What did you just say?!" Kelly said. "You can't say that."
But Trump, who has fiercely feuded with both Fox News and Kelly, wasn't satisfied with her admonishment.
He trashed Lowry on Twitter as "incompetent" and "clueless," demanded an apology, and suggested that the Federal Communications Commission should fine Lowry as a result.
He really doesn't have the temperament for politics or world affairs. Waaah! I demand and apology from Kim Jong-Un he should be fined by the UN. I thought he was a rough and tough New Yorker. Apparently he is very much like a 12 year old girl that has to "Tweet back twice as hard" to the Mean Girls at Fox News.