Pat DeWine is an American politician of the Republican party who serves as a member of the Hamilton County Commission. He took office in January 2005, having defeated John Dowlin in the Republican primary in March 2004 and winning the general election on November 2, 2004. DeWine is the son of U.S Sen. Michael DeWine. He has recently announced his candidacy for the U.S. House seat being vacated by Rob Portman.