Trump threatens to send National Guard troops to quell protests, even in states that don't want the Guard there---can he do that?

KNXAM: On-Demand
Tuesday, June 2nd
President Trump has always viewed himself as a tough-on-crime, a "law-and-order" type, and yesterday he played the part, clearing peaceful protesters from a park in front of the White House before a photo-op. He also threatened to send in the military to put down protests in cities........whether mayors and governors wanted troops there or not.  Can he do that?

Justin Levitt teaches constitutional law at Loyola Law School; he formerly served as Deputy Assistant Attorney General of the U.S. for Civil Rights