President Donald Trump on Monday slammed an NYU political science professor for tweeting a made-up quote he attributed to the president.

Ian Bremmer had posted the following Saturday:

"President Trump in Tokyo: 'Kim Jong Un is smarter and would make a better President than Sleepy Joe Biden.'"

He later added: "This is objectively a completely ludicrous quote. And yet kinda plausible. Especially on twitter, where people automatically support whatever political position they have."

The tweet was widely shared, and Trump later called out the need to change libel laws to hold "Fake News Media" accountable.

The president tweeted:

".@ianbremmer now admits that he MADE UP 'a completely ludicrous quote,' attributing it to me. This is what's going on in the age of Fake News. People think they can say anything and get away with it. Really, the libel laws should be changed to hold Fake News Media accountable!"

Bremmer has since deleted the tweets and issued an apology:

"My tweet yesterday about Trump preferring Kim Jong Un to Biden as President was meant in jest. The President correctly quoted me as saying it was a 'completely ludicrous' statement. I should have been clearer. My apologies."