epa02426904 A visitor to Venice Beach boardwalk talks with a man promoting medical marijuana in Venice, California USA 02 November 2010. Californians will vote on Proposition 19 which if passed will legalize marijuana for recreational use. Mid-term elections are being held across the United States with many highly contested races that could threaten the political futures of numerous incumbents as well as change the balance in the Senate and House of Representatives. EPA/MIKE NELSON