The Pentagon said Saturday it was ready to provide military help to authorities scrambling to contain unrest in Minneapolis, where George Floyd's death has sparked widespread protests, but Gov. Tim Walz has not requested federal troops.
"We can not and must not allow a small group of criminals to wreck our cities and lay waste to our communities", the president said before indicating the "overwhelming" support for police officers.
Twitter placed a public interest notice on the post, which said the tweet "violated the Twitter rules about glorifying violence".
This is despite Facebook CEO Mark Zuckerberg having a "visceral negative reaction" to the rhetoric.
"When the looting starts, the shooting starts", Trump wrote, apparently quoting former the former Miami police chief Walter Headley, who in December 1967 promised violent reprisals to protests over stop-and-frisk tactics.
Calling the protesters "Thugs", Trump, in a tweet made an hour after midnight on May 29, wrote: "These THUGS are dishonoring the memory of George Floyd, and I won't let that happen".
He later added that "it was spoken as a fact, not as a statement. Honor the memory of George Floyd!"
Earlier in the day, the president tweeted repeatedly about the protests. This moment calls for unity and calmness, and we need empathy for the people and communities who are hurting.
Mr Cruz, a Republican ally of Mr Trump, wrote a letter asking the Justice and Treasury Departments to open an investigation into Twitter Inc "for possible criminal violations" of U.S. sanctions against Iran.
"But I'm responsible for reacting not just in my personal capacity but as the leader of an institution committed to free expression". Second, he added that the post was not deleted due to the mention of "The national guard", which the company interpreted as "a warning about state action", adding that "we think people need to know if the government is planning to deploy force". First, he said, "Our policy around incitement of violence allows discussion around state use of force, although I think today's situation raises important questions about what potential limits of that discussion should be".
"I know many people are upset that we've left the President's posts up", Zuckerberg wrote in a Facebook post.
"We believe that if a post incites violence, it should be removed regardless of whether it is newsworthy, even if it comes from a politician".
President Donald Trump is known for being especially active on social media over the years.
Trump signed the order in a bid to strip social media platforms of some of the legal protections that they enjoy.