Rosie O’Donnell on Sunday said President-elect Donald Trump Donald John TrumpTrump says he doesn't think he could've done more to stop virus spread Conservative activist Lauren Witzke wins GOP Senate primary in Delaware Trump defends claim coronavirus will disappear, citing 'herd mentality' MORE is “mentally unstable,” adding that there are less than three weeks to “stop him.”

“DONALD TRUMP IS MENTALLY UNSTABLE,” she tweeted, pointing to a report that a Trump biographer says the billionaire kicked him off a golf course over the weekend.

“LESS THAN 3 WEEKS TO STOP HIM AMERICA,” she added.

DONALD TRUMP IS MENTALLY UNSTABLE - https://t.co/6AvhoPq1du



LESS THAN 3 WEEKS TO STOP HIM AMERICA — ROSIE (@Rosie) January 1, 2017

The comedienne later said in a tweet that Trump is “MENTALLY ILL” while pointing to an article about a student’s photo series that includes Trump’s quotes about women.

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O'Donnell and Trump feuded throughout the presidential campaign.

Last September, she called the then-GOP presidential nominee an “orange anus” after he said during a debate that she “deserved” his attacks in their war of words.