After Nevada's Culinary Workers endorsed Barack Obama, the Teachers Union filed suit to stop Saturday's caucuses from being held in casinos. It's not because of the gambling, which is Nevada's biggest industry. The teachers union, which claimed that the newly created precincts favored some voters over others, has ties to Clinton. But today, US District Court Judge James Mahan ruled that state Democrats had a right to set their own caucus rules. David Damore is an Assistant Professor of Political Science at University of Nevada, Las Vegas.