Trump, Mark Cuban spar on Twitter; preview of 2020 presidential race?

President Donald Trump launched a seemingly out-of-the-blue attack against Mark Cuban on Sunday, calling the billionaire Dallas Mavericks owner ”not smart enough to run for president.”

Cuban brushed off the tweet with a “Lol,” then posted comments he made in a May 2016 email criticizing Trump’s campaign, and offering tips on how to improve:

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!

— Donald J. Trump (@realDonaldTrump) February 12, 2017

Lol https://t.co/c4VkkX3ODP

— Mark Cuban (@mcuban) February 12, 2017

How soon they forget .

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