President Trump says he will close the United States’ southern border, or large sections of it, next week if Mexico does not immediately stop illegal immigration. Here Trump speaks to reporters during a visit to Lake Okeechobee and Herbert Hoover Dike at Canal Point, Fla., on Friday.

President Trump says he will close the United States’ southern border, or large sections of it, next week if Mexico does not immediately stop illegal immigration. Here Trump speaks to reporters during a visit to Lake Okeechobee and Herbert Hoover Dike at Canal Point, Fla., on Friday