Military aiding immigration enforcement in Florida, Louisiana and Texas

• The military generally cannot perform law enforcement functions on American soil, but the service members will help process undocumented immigrants at detention centers, Pentagon spokesperson Sean Parnell said in a statement.

What they're saying: "This support provides critical resources to support ICE's mission, freeing up law enforcement personnel to focus on law enforcement tasks and missions," Parnell said.

• "The Department remains committed to securing 100% operational control of the border."

Zoom in: The military personnel will come from all components and operate in a Title 10 duty status, meaning their duty is federally controlled and federally funded.

• Their mobilization was authorized last week.

Zoom out: Like at Los Angeles protests, the military will not directly conduct law enforcement.

• National Guard members and Marines were deployed by the Trump administration in response to anti-immigration raid protests in Los Angeles this month.

Go deeper: Immigration crackdown fears hit white-collar offices