'Our president is sick': Trump hammered for 'rancid racist' attack on NASCAR's Bubba Wallace

President Donald Trump lobbed an attack against Black NASCAR driver Bubba Wallace -- prompting horrified outrage.

The president demanded an apology from Wallace, after NASCAR launched an investigation of a noose found in the driver's garage that turned out to have been placed on the door months before he had used the facility, and the racing association outraged some fans by banning Confederate flags from events.

"Has @BubbaWallace apologized to all of those great NASCAR drivers & officials who came to his aid, stood by his side, & were willing to sacrifice everything for him, only to find out that the whole thing was just another HOAX?" Trump tweeted. "That & Flag decision has caused lowest ratings EVER!"

Other social media users pounded the president for the racist attack.