Mark Cuban urged CEOs in an interview with a Texas newspaper to “do what you think is right" and to “be an American citizen first." | Getty Trump bashes Mark Cuban on Twitter

President Donald Trump tweeted Sunday morning that Dallas Mavericks owner Mark Cuban is "not smart enough to run for president," likely a response from comments Cuban made Friday warning CEOs to be careful in talking with and about Trump.

"I know Mark Cuban well. He backed me big-time but I wasn't interested in taking all of his calls.He's not smart enough to run for president!" Trump wrote.


On Friday, Cuban, a venture capitalist who supported Hillary Clinton during the presidential election, urged CEOs in an interview with The Fort Worth Star-Telegram to “Do what you think is right" and to “be an American citizen first."

“In the bigger scheme of things, our country benefits from peaceful activism a lot more than it benefits from one more shoe being sold, or one more basketball ticket being sold, for that matter," Cuban said. "The people that say stay away from politics are the people that are looking for politics.’’



Cuban first dismissed Trump's tweet by replying with "LOL." Cuban then tweeted an image of a 2016 letter he wrote to Trump saying that in order to be president, Trump needed "to really dig in on the issues."

Cuban also replied to a tweet on why Trump is dissing him, saying: "I don't know. But isn't it better for all of us that he is tweeting rather than trying to govern?"

On Sunday afternoon, Cuban told the Huffington Post that he believes Trump tweeted about him because of a story in the New York Post.

“Someone close to him told me it was a NYpost article saying I was a 2020 threat. That’s all I know," he said.