Donald Trump crossed paths with some of his presidential campaign rivals when he attended Iowa’s biggest annual college football game. Trump visited Jack Trice Stadium in Ames, where Iowa State was playing Iowa. Also on hand were Florida Gov. Ron DeSantis and several other lesser-known candidates. It was one of Trump's few visits so far to the state that holds the first nominating caucus. As the race enters its traditional ramp-up after Labor Day, neither DeSantis nor any other rival has challenged Trump’s standing atop the field in Iowa. That's even as the former president skips most of the state's cherished campaign traditions.