Körper had entered the Bundestag in the 2005 and 2009 federal elections via the state list of Rhineland-Palatinate and before that always as a directly elected member of the Bundestag for the constituency of Kreuznach. In the 2013 Bundestag election, he ran again for the constituency as well as in 12th place on the state list, but was unable to win a Bundestag mandate again.