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Claire Conner McCaskill (born 24 July 1953) is a senior United States Senator from Missouri and a member of the U.S. Democratic Party. She was the first female elected to the Senate of United States in her own right. Before being elected to United States Senate McCaskill was the Missouri State Auditor from 1999 to 2007. She is a native of Rolla and a graduate of the University of Missouri.