Roskam got almost 69% of the vote.
In 2016 Jay Kinzler ran against Peter Roskam in the Republican Primary Election.
He lost and then ran unsuccessfully for State Representative, receiving just over 41% of the vote.
But he won a contested primary, getting 79% of the vote.
He seems to have been supported by Dan Proft in his State Rep. run.
Already in the race are former Lt. Governor Evelyn Sanguinetti and former State Rep. Jeanne Ives, who almost bested incumbent Rauner in last year’s GOP gubernatorial primary.
There is some talk that Ives is not going to rely on Proft in her congressional ran. so it is possible that Kinzler may be Proft’s candidate.