Illinois 9th — House 2026 Rep Primary
The Illinois 9th — House rep primary is scheduled for March 17, 2026. The model makes Mark Su the clear favorite at 86%, ahead of John Elleson at 5% in a 4-candidate field. Mark Su leads the field in reported fundraising and John Elleson has the most tracked endorsements. Public polling is available for this race and feeds the forecast alongside fundraising, endorsements, and historical results.
Current win probabilities
- Mark Su — 86%
- John Elleson — 5%
- Paul Friedman — 5%
- Rocío Cleveland — 5%
Probabilities update daily from polls, fundraising, endorsements, and historical results.