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SAN FRANCISCO - FEBRUARY 5: Stickers that say "I Voted" in English, Spanish and Chinese are seen at a polling place February 5, 2008 in San Francisco, California. Voters in 24 states head to the polls today in the U.S. presidential election's biggest primary day, Super Tuesday. (Photo by David Paul Morris/Getty Images)

SAN FRANCISCO - FEBRUARY 5:   Stickers that say "I Voted" in English, Spanish and Chinese are seen at a polling place February 5, 2008 in San Francisco, California. Voters in 24 states head to the polls today in the U.S. presidential election's biggest primary day, Super Tuesday.  (Photo by David Paul Morris/Getty Images)