The executive took to his personal Facebook page to respond to an article about the former Apprentice star

By Natalie Stone
Updated August 16, 2016 07:00 PM
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Credit: Sara D. Davis/Getty Images

Though NBC was once home to Donald Trump, the GOP candidate‘s warmly welcomed days at the network are gone, according to chairman Bob Greenblatt.

Two weeks after the executive publicly told a group of reporters at the Television Critics Association tour in Beverly Hills that Trump "would never be back on Celebrity Apprentice, as long as I’m here," he is slamming the reality star–turned–politician as “toxic” and “demented.”

“The sad state of affairs thanks to a pompous businessman turned reality TV star (whose show consistently ran LAST in its time period, by the way) who thinks speaking his mind is refreshing,” the chairman penned in a Facebook post in response to a New York Times op-ed titled “Donald Trump is Making America Meaner.”

“It’s actually corrosive and toxic because his ‘mind’ is so demented; and his effect will unfortunately linger long after he’s been told to get off the stage,” he continued, Page Six first reported.

A source confirms to PEOPLE that the post was a personal post on Greenblatt’s private page, which is not open to the public.

The source also tells PEOPLE that it was not written as a rant, but rather as an emotional response to the New York Times piece.

Trump, 70, was the host and star of The Apprentice and The Celebrity Apprentice across 14 seasons. The Trump-free New Celebrity Apprentice, now hosted by former California governor Arnold Schwarzenegger, is set to premiere its in 2017.

NBC had no comment.