On the campaign trail, a federal judge has rejected a lawsuit seeking to ban caucus sites in nine Las Vegas hotels for Saturday’s Democratic vote in Nevada. The sites were established last March to accommodate workers who can’t attend caucuses in their neighborhoods. The largely Latino and female workforce in almost every casino on the Strip is organized by the 60,000-member Culinary Workers Union, which has endorsed Senate Barack Obama. Days after the endorsement the Nevada State Teachers Union and individuals backing Senator Hillary Rodham Clinton filed a lawsuit alleging the casino sites create a “preferred class of voters.” But on Thursday U.S. District Judge James Mahan rejected the case and said the caucus sites can proceed as planned.