The Trump administration had urged the high court to uphold the law, surprising perhaps because the president is the former owner of a New Jersey casino, the Trump Taj Mahal, now being remade into a Hard Rock casino resort. All four major U.S. professional sports leagues and the NCAA also had urged the court to uphold the federal law, saying a gambling expansion would hurt the integrity of their games. They also said that with legal sports betting in the United States, they'd have to spend a lot more money monitoring betting patterns and investigating suspicious activity.