"No one signs up to join the United States Marine Corps to attack protesters," U.S. Rep. Seth Moulton, D-6th District, a former Marine, told MSNBC on Sunday.

"If he can successfully militarize LA without significant political consequences, Baltimore is next," said Angela Angel of BLM PAC.

WASHINGTON—In response to the Trump administration’s activation and deployment of members of the military for “the protection of federal functions and property” during protests in Los Angeles, Freedom House interim Copresidents Gerardo Berthin and Annie Boyajian issued the following statement:

Trump issued a memo to deploy troops to areas where protests are occurring or "likely to occur," which may allow forces to operate in other cities.

The deployment of troops to Los Angeles raises questions about what Trump can and can't do with the military on U.S. soil, and whether he's crossing the line.

LA Mayor Karen Bass came out against deploying federal troops in her city to deal with unruly protests, saying local law enforcement was on top of the situation.

This week marks a jarring collision of the military and civilian relationship, one that has traditionally remained carefully apolitical. It's a week bookended by two high-profile events, both steeped in Trump-era symbolism.

Sen. Alex Padilla was removed from a Los Angeles news conference by Homeland Security Secretary Kristi Noem, while a federal judge weighed the merits of military deployments on Thursday.