Late-night host Jimmy Fallon on Tuesday mocked President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE over the ouster of Secretary of State Rex Tillerson Rex Wayne TillersonGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Conspicuous by their absence from the Republican Convention MORE earlier in the day.

“I heard Trump has been telling people that he fired Rex Tillerson all by himself. Trump brags about firing people the same way a toddler brags about using the bathroom alone for the first time," Fallon said on "The Tonight Show."

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The president revealed in a tweet on Tuesday that he had fired Tillerson, and would replace him with CIA Director Mike Pompeo Michael (Mike) Richard PompeoUS reimposes UN sanctions on Iran amid increasing tensions Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Trump steps up Iran fight in final election stretch MORE.

Mike Pompeo, Director of the CIA, will become our new Secretary of State. He will do a fantastic job! Thank you to Rex Tillerson for his service! Gina Haspel will become the new Director of the CIA, and the first woman so chosen. Congratulations to all! — Donald J. Trump (@realDonaldTrump) March 13, 2018

Trump told reporters Tuesday morning that he made the decision “by myself,” suggesting he did not speak with Tillerson before firing him.

“I actually got along great with Rex, but really, it was a different mindset,” the president said.

Fallon's late-night cohort Jimmy Kimmel also hit Trump over Tillerson's firing, making a joke referring to first lady Melania Trump Melania TrumpMelania Trump: Ginsburg's 'spirit will live on in all she has inspired' The Hill's 12:30 Report - Presented by Facebook - You might want to download TikTok now Warning label added to Trump tweet over potential mail-in voting disinformation MORE.

“I’m starting to think he fires people just so he can get some going-away cake at the party. Trump told reporters he made this decision ‘by myself.’ Like a 5-year-old. ‘I did it all by myself.’ Of course you did by yourself, there’s no one left at the White House anymore. It’s just you and your Slovenian captive,” Kimmel said to gasps and applause.

“Was that too much? I’ll make a note of that," he added.