claire conner mccaskill (born july 24, 1953) is an american politician. she was the united states senator from missouri from 2007 to 2019. she is a member of the u.s. democratic party. she was the first woman from missouri elected to the united states senate. before being elected to united states senate mccaskill was the missouri state auditor from 1999 to 2007. she was born in rolla, and she went to school at the university of missouri.