U.S. officials say active duty military troops are arriving in El Paso, Texas, and in San Diego on Thursday evening.

Border Patrol agent's actions with K9 spark controversy at Texas checkpoint, Laken Riley Act passes first hurdle, Trump hints at executive orders.

Officials said the agent was shot on Interstate 91, which was closed for several hours near the border with Canada.

Jason Owens, the retiring chief, said he hopes future leaders remain impartial and keep politics out of the agency.