Trump lashes out at 'crazy and very dumb' Mika Brzezinski in latest Twitter tantrum

Republican presidential nominee Donald Trump pitched another Twitter tantrum on Thursday, this time lashing out at MSNBC's Mika Brzezinski -- co-host of Morning Joe.

"Just heard that crazy and very dumb @morningmika had a mental breakdown while talking about me on the low ratings @Morning_Joe. Joe a mess!" wrote Trump.

This followed a tweet from last week in which the candidate said Brzezinski is a "neurotic and not very bright mess."

It's not clear what particular segment of programming the candidate is referring to. The Morning Joe crew have soured on Trump in recent weeks, after years of frequent guest appearances in which the former reality TV star was treated as a kind of amusing carnival barker.

Earlier this week, Brzezinski questioned Trump's mental health, saying, "It’s time to hear from somebody in the mental health community, to look at this person who has been on television for months and to give us a sense of what we have going on here. And, I’m sorry, let’s just not -- let’s stop pretending we’re dealing with someone who we can completely understand.”

In early August, she urged Trump supporters to "wake up" and realize they're getting scammed.

Trump is notoriously thin-skinned and takes particular umbrage when he's criticized by women. He has blasted both Brzezinski and her Morning Joe co-host Joe Scarborough for critical remarks in the past, jabbing the show's "low ratings." However, the show and its parent network have been enjoying some of their best ratings in years during the 2016 election season.

This week, Scarborough released a music video in which he taunted the Republican nominee for his shift on immigration policy, calling Trump "Amnesty Don."

Trump's offensive tweet is embedded below: