Cook County Democratic Party officials on Thursday and Friday will hear from 56 candidates for judicial office in 2020, including seven who are hoping to get the party’s backing for their Illinois Supreme Court bids.Six of the seven candidates who are eyeing the vacancy left open by the June 2018 retirement of Charles E. Freeman, the high court’s first black justice, are or were members of the 1st District Appellate Court: Cynthia Y. Cobbs, Sheldon A. Harris, Nathaniel R. Howse Jr., Margaret Stanton McBride and …