 However, Roberts withdrew from the race after learning he would likely be called to active duty in the U.S. Army Reserve.Bob DeVore Jr., activist Corley C. Everett and developer Chris Thieneman filed to run in the Republican Primary.Thieneman, who spearheaded a successful campaign to defeat a Jefferson County library tax referendum in 2007 and ran unsuccessfully for Jefferson County Clerk in 2002, dropped out of the race on January 31, declared a return to the Democratic Party, and endorsed John Yarmuth in the election.