SPRINGFIELD — Two out of the three downstate judges who will let their terms lapse in order to run in traditional re-election races next year will face challengers.Twentieth Circuit Chief Judge John Baricevic and Circuit Judge Robert P. LeChien, both Democratic candidates, will each face a Republican challenger.Ronald R. Duebbert of Duebbert Law Office P.C. in Belleville will run against Baricevic.Laninya A. Cason of Belleville, a former associate judge who was ousted from the bench in a vote of circuit judges …