FILE PHOTO: U.S. President Trump participates in briefing at U.S.

FILE PHOTO: U.S. President Donald Trump participates in a roundtable discussion on immigration and border security at the U.S. Border Patrol Calexico Station before visiting the U.S.-Mexico border in Calexico, California, U.S., April 5, 2019. REUTERS/Kevin Lamarque/File Photo