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U.S. Representative · Illinois 15th District
Mary E. Miller
RepublicanDistrict R+20119th CongressOn the ballot 2026
Typical swing score63#79 of 433 representatives across tracked bills
Contact Mary E. Miller’s office
Official D.C. office details from the congress-legislators datasetWashington, D.C. office1740 Longworth House Office Building Washington DC 20515-1315
Model
Directional: count only breaks toward the other partyWhy do scores change?v3default (selected)v2 model swing-v2
Signals to watch
What in this member’s district, record and ideology could move them, and in which direction. Their score is the same on every bill they haven’t committed to, so these are the things to watch.Could pull them toward Democrats · 1 signal
- StrongBacks 3 Democratic-led tracked billsSponsor or active cosponsor of 3 of the 865 tracked bills that were introduced by Democrats: H.R. 2466, H.R. 5773, H.R. 6020.
Keeps them with Republicans · 2 signals
- MediumVotes with House RepublicansNo ideology or scorecard measure places this member toward the Democrats: DW-NOMINATE +0.792 (party median +0.530; rank 208 of 219 by distance toward the Democrats); Heritage Action 100 (avg 86); LCV 0 (avg 1).
- MediumSafe Republican district: IL-15 is R+20IL-15 has a partisan lean of R+20 (25% 2020 / 75% 2024 presidential two-party vote vs. the nation). Little electoral pressure to break with the party.
Bill-specific inputs
Term and election
From the congress-legislators datasetOn the ballot 2026
- Current term
- January 3, 2025 – January 3, 2027
- Next election
- November 3, 2026
- Years in office
- 5.8 years
Committees
Seats on a bill’s committee of referral add a in swing-v3- House Committee on AgricultureMajority · 14th in seniority
- Subcommittee on Nutrition and Foreign Agriculture
- Subcommittee on Conservation, Research, and Biotechnology
- Subcommittee on General Farm Commodities, Risk Management, and Credit
- Subcommittee on Livestock, Dairy, and Poultry
- House Committee on Education and WorkforceMajority · 11th in seniority
- Subcommittee on Workforce Protections
- Subcommittee on Early Childhood, Elementary, and Secondary Education
Voting ideology
first dimension, from VoteviewR median
D median
Miller← More liberal (−1)More conservative (+1) →
Their score of +0.792 is 0.26 to the right of the House Republican median (+0.530).
Advocacy scorecards
Their rating vs. the House Republican average- 119th Congress100House Republican average: 86 (n=217)
Swing score by bill
swing-v3 · a bill marks a member as committed to itShowing 51–100 of 858 tracked bills, best swing first
| Bill | Their role | Swing score · | |
|---|---|---|---|
| H.R. 776Nutria Eradication and Control Reauthorization Act of 2025Summary on Congress.gov | No position yetNow in the Senate | 68
| Middle |
| H.R. 2860Northwest Straits Marine Conservation Initiative Reauthorization Act of 2025 |