WASHINGTON—Defense Secretary Jim Mattis has authorized the use of troops and other military resources at the U.S.-Mexico border, U.S. officials said on Oct. 26, bolstering President Donald Trump’s battle against migrants trekking toward the United States.
The officials, who spoke on condition of anonymity, said Mattis’ authorization did not include a specific number of troops, something that would be determined at a later point, and was not itself a “deployment order.”
