Yankton, S.D. – Democrat Brian Bengs is working to ramp up his campaign challenging incumbent republican Senator John Thune. He says his message is time for a change. Bengs says money, finance and taxes is a central theme. Bengs is a former instructor at Northern State University and a veteran of the Navy and Air Force. This is his first run at any elective office. Thune is seeking his fourth term in the Senate. Listen to the interview here.