| − | Democrat [[Claire McCaskill]] is the incumbent. Four Republicans have declared. McCaskill trails in the polls to all four of the leading GOP hopefuls. <ref>[http://www.rasmussenreports.com/public_content/politics/elections/election_2012/election_2012_senate_elections/missouri/election_2012_missouri_senate Election 2012: Missouri Senate, Rasmussen, March 16, 2012 ]</ref> | + | Democrat [[Claire McCaskill]] is the incumbent. Four Republicans have declared. McCaskill trails in the polls to all four of the leading GOP hopefuls. <ref>[http://www.rasmussenreports.com/public_content/politics/elections/election_2012/election_2012_senate_elections/missouri/election_2012_missouri_senate Election 2012: Missouri Senate, Rasmussen, March 16, 2012 ]</ref> Republican Sarah Steelman has the endorsement of [[Sarah Palin]]. |