The appearance at a boisterous rally of the politically potent Culinary Workers Union was a win-win for Clinton, letting her signal her support for an influential union while taking aim at the Democratic party's favorite foil. The union, which represents casino and resort workers, is trying to organize hotel employees and invited all of the five candidates in town for the debate to the rally. Eric Trump, an executive vice president at the Trump organization and the presidential candidate's son, said workers at the hotel are largely happy.