After redistricting, the 16th now curves from Rockford to the Indiana border.
Don Manzullo is the 20-year incumbent in the 16th.
Kinzinger is in his first term as congressman in the 11th, but after redistricting chose to run in the 16th.
Both men claim the mantle of the true conservative in the race.
The change in district boundaries cost the 16th more than half its previous area.