Trump Administration Unveils Plans to Send National Guard Troops, Build Base Walls Near U.S.-Mexico Border

Homeland Security secretary says agency and Pentagon will be directed to work with governors on deployment

WASHINGTON—The White House said Wednesday it would deploy National Guard troops to the border with Mexico and would consider building a wall along at least one military base set on the border.

Administration officials also said they were hoping for a high-profile congressional debate this spring and summer over U.S. protections for children and migrants seeking asylum, saying these “loopholes” were encouraging illegal migration.

The...