Actress and comedian Mindy Kaling mocked President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE on Saturday for Trump's early morning declaration that he was "like, really smart."

Kaling posted an image of her character on "The Office" making a similar declaration of intelligence, with the caption: "Hahahahahaha."

"You guys, I'm like really smart now, you don't even know," Kaling's character says in the image caption.

Kaling joined thousands of other Twitter users and critics of the president on Saturday to mock Trump, who declared in a pair of tweets Saturday morning that he was "like, really smart" and a "very stable genius."

"Actually, throughout my life, my two greatest assets have been mental stability and being, like, really smart. Crooked Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE also played these cards very hard and, as everyone knows, went down in flames. I went from VERY successful businessman, to top T.V. Star to President of the United States (on my first try). I think that would qualify as not smart, but genius....and a very stable genius at that!" Trump tweeted Saturday.

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The tweets became a joke among some social media users.

Trump's mental fitness has been in question for days since the release of a new book, "Fire and Fury: Inside the Trump White House," which revealed that Trump's top aides regularly question his fitness for the job.

The White House has pushed back against the author, Michael Wolff, and the book, which it calls full of false claims.

“It's absolutely outrageous to make these types of accusations and it's simply untrue, and it’s sad that people are going and making these desperate attempts to attack the president," White House press secretary Sarah Huckabee Sanders said on Friday.