Carly Fiorina Says You "Can't Have President Who Is Thin-Skinned," Whines About Trump Insulting Women

Bombastic billionaire Donald Trump is leveling his criticisms at fellow Republican presidential candidate Carly Fiorina, saying she has "zero chance" at winning the GOP nomination.

"I just realized that if you listen to Carly Fiorina for more than ten minutes straight, you develop a massive headache," Trump said Sunday in a Twitter post.

His denunciation of Fiorina marks a fast turnaround from three days ago, when Trump told Fox News that he thought she had been "an effective debater."

Trump's recent tweet continues a battle between Trump and the tech executive that began Friday, when Trump implied Fox News debate moderator Megyn Kelly asked sharp questions because she was hormonal with "blood coming out of her wherever."

Fiorina, the only female in the large GOP candidate field, jumped to Kelly's defense:

Mr. Trump: There. Is. No. Excuse.

— Carly Fiorina (@CarlyFiorina) August 8, 2015

And in an interview that aired Sunday on CBS' "Face the Nation," Fiorina directed even harsher words at Trump.

"I think women of all kinds are really sort of horrified by this," Fiorina told "Face the Nation" host John Dickerson. "Mr. Trump got asked tough questions by a lot of people on Thursday night, but he chose to attack Megyn Kelly."

"I think you cannot have a president who is thin-skinned," the former Hewlett-Packard chief added.