The administration is scrambling as videos of the latest shooting went viral, prompting street protests, criticism from former presidents Bill Clinton and Barack Obama and, increasingly, from within Trump's Republican Party.

"Minnesota has had it. This is sickening. The President must end this operation. Pull the thousands of violent, untrained officers out of Minnesota," Walz said.

Videos show the victim holding a phone in his hand, not a handgun, as he tried to help other protesters.