Republican presidential nominee Donald Trump just won’t stop attacking MSNBC’s “Morning Joe” hosts Mika Brzezinski and Joe Scarborough.

On Friday morning, Trump tweeted that Scarborough was “a mess” and accused Brzezinski of having “a mental breakdown” on air:

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! — Donald J. Trump (@realDonaldTrump) September 2, 2016

Trump regularly attacks the MSNBC hosts. In August, he suggested the two were in a relationship and called Brzezinski an “off the wall, a neurotic and not very bright mess!”

The two hosts have routinely criticized Trump on their show over the last few months, highlighting his “completely racist” remarks and saying his “stupidity is breathtaking.”

Editor’s note: Donald Trump regularly incites political violence and is a serial liar, rampant xenophobe, racist, misogynist and birther who has repeatedly pledged to ban all Muslims — 1.6 billion members of an entire religion — from entering the U.S.