Los Angeles police swiftly enforced a downtown curfew Tuesday night, making arrests moments after it took effect, while deploying officers on horseback.

President Donald Trump has warned that he would send troops into other cities in the U.S. should rioting and disorder similar to that seen in Los Angeles break out, and with "greater force."Why It MattersIt comes after Trump sent 4,

Trump's effort to use the military to quell protests received pushback for his staff during his first administration. Now he's trying again.

President Donald Trump and his administration officials warned that the use of the military in response to protests against his immigration crackdown may not be limited to just Los Angeles, saying it could be the first "of many" -- and that protesters could be met with "equal or greater force.