Illinois Democrats leave primary open for Jackson's House seat from Reuters: Politics CHICAGO (Reuters) - Democratic ward bosses from Chicago and its suburbs failed on Saturday to endorse a candidate to succeed former U.S. Representative Jesse Jackson Jr., creating an open primary in February for the vacant Illinois congressional seat. feeds.reuters.com/~r/Reuters/PoliticsNews/~3/MbxfwCRnD_o/us-usa-politics-illinois-congress-idUSBRE8BE06F20121216