YUMA, Arizona (AP) — The White House says President Donald Trump is scheduled to visit a Marine Corps base in Arizona along the U.S.-Mexico border. Trump is set to visit Marine Air Station Yuma on Tuesday afternoon before he travels to Phoenix to hold a rally. Yuma's location along the U.S.-Mexico border touches on one of Trump's signature issues: his call for putting up a border wall to stem illegal immigration from Mexico. The rally in Phoenix will take place at the city's convention center.