John Cullerton, a Democrat from the North Side, resigned from Senate District 6 after more than four decades in office. Cullerton served as the 38th president of the state Senate.

Sen. Don Harmon, a Democrat from Oak Park, was elected unanimously to replace Cullerton as Senate president.

Democratic ward and township committeemen within the 6th District have 30 days after Cullerton’s resignation to name a replacement.

Because Cullerton did not file paperwork for his retirement with the Secretary of the Senate, there will not be a primary for the seat in March.

Local Democratic and Republican party leaders in Cullerton’s district will select who will be on the November ballot to finish out Cullerton’s term ending January 2023.