Daniel K. Biss
DMayor of Evanston (since 2021)
Daniel Biss is the Democratic nominee for the open Illinois 9th District seat. A former state legislator and current mayor of Evanston, he won the crowded March 2026 Democratic primary.[1][2]
Basic profile — the most important sourced facts we found.
On the record — official actions
- actionChaired the Illinois Senate Human Services Committee in the 2015 legislative session and the Labor Committee in the 2017 session.[3]
Positions on the issues
- SupportsProtect legal access to abortion
Says he has passed legislation preserving access to abortion and would continue to stand up for it in Congress.[2]
- OpposesExpand immigration enforcement and deportations
Says he would stand up to the Trump administration on immigration.[2]
- SupportsFaster transition away from fossil fuels
Cites having passed stricter carbon-efficiency standards for buildings as a state legislator.[2]
In their words — priorities
- Says he has a record of passing legislation preserving access to abortion, changing campaign finance law, and setting stricter carbon-efficiency standards for buildings while in the state legislature and as mayor.[2]
- Says he would stand up to President Trump on immigration, preserving access to abortion, and expanding mental health services.[2]
Background
- Earned a bachelor's degree in mathematics from Harvard University and a doctorate in mathematics from the Massachusetts Institute of Technology.[2]
- Worked as a math professor at the University of Chicago before entering elected politics.[2]
- Served in the Illinois House of Representatives (2011–2013) and Illinois Senate (2013–2019) before being elected mayor of Evanston in 2021.[2][3]
- Chaired the Illinois Senate Human Services Committee in the 2015 session and the Labor Committee in the 2017 session.[3]
Campaign money
Raised $2.9M · spent $2.7M · $262K cash on hand (through 2026-06-30) FEC filing ↗