 Donnelly was named to the House Financial Services Committee for the 110th Congress.On May 8, 2012, Donnelly ran unopposed for the Democratic nomination for the U.S. Senate after acknowledging the difficulty of winning reelection in his new home district drawn per the 2010 census.He faced a Tea Party favorite, Indiana State Treasurer Richard Mourdock, who had defeated six-term incumbent Richard Lugar in the Republican primary, and Libertarian nominee Andy Horning.