A voter arrives with her son to cast her ballot in the US presidential primary election at the Belmont Middle School in Saugus, Massachusetts, February 5, 2008. Twenty-four of the 50 states are holding nominating contests for one or both parties on "Super Tuesday" for a huge haul of delegates to this summer's conventions that will choose the candidates for the November presidential election. REUTERS/Adam Hunger (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)