Melvin Clay of the DC Cannabis Campaign holds a sign urging voters to legalize marijuana, in Washington

Melvin Clay of the DC Cannabis Campaign holds a sign urging voters to legalize marijuana, at the Eastern Market polling station in Washington November 4, 2014. Voters in the U.S. capital and two West Coast states will decide on Tuesday during national midterm elections whether to legalize marijuana in a test for broader cannabis legalization efforts across the United States. REUTERS/Gary Cameron (UNITED STATES – Tags: POLITICS DRUGS SOCIETY ELECTIONS BUSINESS HEALTH)