Mercer County Commissioner John Bruns, R-Maria Stein, accompanied by his wife Irene, is sworn into office for another term on Tuesday afternoon in the Mercer County Courthouse by Mercer County Juvenile Probate Judge Mary Pat Zitter. Bruns, who was first appointed commissioner in March 2007 to fill the unexpired term of Jim Zehringer, will serve a four-yar term. He defeated challenger Ron Hammons of Celina in the November election.