The tweet came in response to an interview James conducted with CNN host Don Lemon, a frequent punching bag for the president.
The White House did not immediately respond to a request to clarify Trump's remarks.
James received publicity during the week for opening his new school in Akron, Ohio.
Lemon responded to Trump's tweet this morning with a nod to First Lady Melania Trump's campaign against bullying. James said that he wouldn't have anything to say to Trump if he met him in person, joking that he'd "sit across from Barack [Obama], though".
Trump, meanwhile, is headed to OH, as he is set to hold a "Make America Great Again" rally in Lewis Center, just north of Columbus, on Saturday at 6:30 p.m.
Utah Jazz star Donovan Mitchell is defending National Basketball Association great, Lebron James from what he calls "stupid tweets" from President Donald Trump.
LeBron James has just opened a school for underprivileged children in Ohio. It may be a reference to Michael Jordan, the NBA Hall-of-Famer whose legacy James is endlessly compared with.
He has repeatedly said that anyone who kneels during the anthem should be fired. A man who puts kids in classrooms or one who puts kids in cages?
Amy Lieu is a news editor and reporter for Fox News. "They always use it to say 'OK, this is even more motivation, this is even more a way for me to even be more powerful.' And they're the reason why we are here today".
James tweeted at the time.
"Rather than criticizing [LeBron James], we should be celebrating him for his charity work and efforts to help kids", Kasich, a frequent critic of the president, tweeted Saturday morning. I know why. Some of y'all need to start believing what he is showing you.