Citing his authority as commander in chief, the president claims he can order a wall to be built with or without congressional approval.
Amnesty International's Justin Mazzola says the Trump administration is not only "endangering families" but "defying international law."
A package of bills introduced Monday would put federal employees back to work without approving money for the president's border wall.
Juan David Ortiz, 35, faces the death penalty after confessing to the slaying of multiple sex workers.
How well are U.S. forces prepared to handle large numbers of civilians? The federal government refuses to say.
The Defense Department is also deploying lawyers to the Southern border to prosecute immigrants entering the country.