 In the Republican runoff primary held on July 31, King unseated freshman Representative Jim Landtroop of Plainview.Chisum did not seek renomination to the House in the Republican primary held on May 29, 2012.Instead he ran for a seat on the Texas Railroad Commission, the position held on an interim basis by Buddy Garcia and vacated in February 2012 by the elected commissioner, Elizabeth Ames Jones of San Antonio.