Derrick Smith, the state representative ousted from office earlier this year amid federal bribery charges, is heading back to office.
Smith has pleaded not guilty to the charges and last month expressed confidence that voters would send him back to Springfield.
Tyson, the former chief of staff for former County Board President Todd Stroger, was backed by Gov. Pat Quinn, Secretary of State Jesse White and aldermen from eight wards in the district.
Prosecutors allege Smith took a bribe to write what he thought was a letter of support for a day care center's state grant application.
His Illinois House colleagues in August voted 100-6 to expel him. It was the first time the House had expelled a member in more than 100 years. llinois law says he cannot be expelled a second time for the same reason.