Sen. Mark Begich of Alaska, formerly the mayor of Anchorage, narrowly defeated scandal-plagued longtime Sen. Ted Stevens to win his Senate seat in 2008. Lt. Gov. Mead Treadwell, 2010 Senate candidate and tea party favorite Joe Miller and former Alaska Attorney General Daniel Sullivan are vying for the opportunity to challenge Begich for his seat in November. Alaska's primaries will be held on Aug. 19. (Associated Press)
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