U.S. Senate candidates Rep. Tammy Duckworth and Sen. Mark Kirk shake hands after their debate Oct. 3, 2016, in the Chicago Tribune editorial board room.
U.S. Senate candidates Rep. Tammy Duckworth and Sen. Mark Kirk shake hands after their debate Oct. 3, 2016, in the Chicago Tribune editorial board room. Nancy Stone AP
U.S. Senate candidates Rep. Tammy Duckworth and Sen. Mark Kirk shake hands after their debate Oct. 3, 2016, in the Chicago Tribune editorial board room. Nancy Stone AP