The same morning that Hillary Clinton announced an $80 million TV ad buy, Donald Trump threatened to spill the beans about Joe Scarborough and “long-time girlfriend” Mika Brzezinski, his MSNBC co-host.

Trump, who has for months railed against “Morning Joe,” tweeted Monday morning:

Some day, when things calm down, I’ll tell the real story of @JoeNBC and his very insecure long-time girlfriend, @morningmika. Two clowns! — Donald J. Trump (@realDonaldTrump) August 22, 2016

The real estate mogul also tweeted he tried to watch the “low-rated” MSNBC morning show, but found it “unwatchable” because of “neurotic” Brzezinski.

Tried watching low-rated @Morning_Joe this morning, unwatchable! @morningmika is off the wall, a neurotic and not very bright mess! — Donald J. Trump (@realDonaldTrump) August 22, 2016

The “Morning Joe” hosts, who have been rumored to have an off-screen romance, didn’t let Trump’s smear slide.

Scarborough fired back on Twitter:

Neurotic and not very bright?

Look in the mirror. https://t.co/FPaqGW9JWv — Joe Scarborough (@JoeNBC) August 22, 2016

The former congressman also sarcastically thanked the GOP nominee for tuning in.

Thanks for watching.

Morning Joe is enjoying it’s best ratings ever thanks to obsessed fans like you. GLAD😀 https://t.co/FPaqGW9JWv — Joe Scarborough (@JoeNBC) August 22, 2016

Brzezinski, for her part, simply retweeted Clinton spokeswoman Jennifer Palmieri suggesting Trump’s tweet showed he was “unnerved” by the campaign’s new ad.