President Trump returns Tuesday night to the same Phoenix convention center where he spoke during the campaign last year, laying out a 10-point plan to fight illegal immigration. He's also visiting a U.S. Customs and Border Protection facility in Yuma, Ariz., a few miles from the Southwest border. Now seven months into his presidency, Trump has pushed for dramatic changes to the nation's immigration system. But he's also been stymied by Congress and by the courts.