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U.S. House · Illinois's 6th District

Western Chicago suburbs in DuPage and Cook counties, including Naperville, Wheaton, Elmhurst, Lombard and Glen Ellyn.

General election · Tuesday, November 3, 2026

RESULT · UNOFFICIAL UNTIL CERTIFIED

Sean Casten, projected winner

CandidateVotesShare
Sean Casten163,01962.8%
Niki Conforti96,42937.2%

About 97% of the expected vote counted. As of November 9. Winners take office next year. Counts can change until states certify. NBC News ↗

Sources re-checked September 25, 2026 · How we research

  • Incumbent Sean Casten won the March 17, 2026 Democratic primary against Joey Ruzevich 75.8%-24.2%. Niki Conforti won the Republican primary against Skylar Duensing 82.2%-17.8%. Heading into 2026, based on the 2020 and 2024 presidential elections, Ballotpedia calculated the district's Cook Partisan Voter Index as D+3.[1]

On the November 3 ballot · 2 candidates

Sean CastenDINCUMBENTPROJECTED WINNERU.S. Representative (since 2019)Full profile →Niki ConfortiRFull profile →

Issue evidence — side by side

Recorded votes, documented positions and candidates’ own words are shown with sources. “In their own words” quotes a candidate on the topic without inferring a stance. Votes describe specific bills or motions; they do not establish overall support or opposition to a broad issue. A dash means our research has no evidence on that topic, not that the candidate has no position.

Protect legal access to abortion

  • Sean Casten
    Recorded votes[32][33]

    Voted yes on Women's Health Protection Act of 2021 (H.R. 3755, 2021-09-24). Voted yes on Women's Health Protection Act of 2022 (H.R. 8296, 2022-07-15).

  • Niki Conforti
    Opposes[3]

    Describes herself as pro-life with exceptions for rape, incest and the life of the mother, and criticizes her opponent's support for abortion access.

Stricter gun laws

  • Sean Casten
    Recorded votes[28][29][30]

    Voted yes on Bipartisan Background Checks Act (H.R. 8, 2019-02-27), which would have required background checks on most private gun sales. Voted yes on Assault Weapons Ban of 2022 (H.R. 1808, 2022-07-29), which would have banned the sale of many semiautomatic assault weapons. Voted yes on Bipartisan Safer Communities Act (S. 2938, 2022-06-24), which expanded background checks for buyers under 21 and funded state red-flag programs.

  • Niki Conforti
    —

Expand immigration enforcement and deportations

  • Sean Casten
    Recorded votes[14][15][16][17][18][19][20]

    Voted no on Laken Riley Act (S. 5, 2025-01-22). Voted no on One Big Beautiful Bill Act (H.R. 1, 2025-05-22; 2025-07-03), which funded expanded immigration enforcement, detention and border operations. Voted no on Secure the Border Act of 2023 (H.R. 2, 2023-05-11). Voted yes on American Dream and Promise Act of 2019 (H.R. 6, 2019-06-04; 2021-03-18).

  • Niki Conforti
    Supports[3]

    Supports expanding ICE and deporting violent criminals, while saying she supports legal immigration.

Raise taxes on high earners or corporations

  • Sean Casten
    Recorded votes[15][16][17][24]

    Voted no on One Big Beautiful Bill Act (H.R. 1, 2025-05-22; 2025-07-03), which made the 2017 individual tax rates, including the 37% top rate, permanent. Voted yes on Inflation Reduction Act (H.R. 5376, 2022-08-12), which added a 15% minimum tax on large corporations and a stock-buyback excise tax.

  • Niki Conforti
    —

Expand public health coverage

  • Sean Casten
    Recorded votes[15][16][17][22]

    Voted no on One Big Beautiful Bill Act (H.R. 1, 2025-05-22; 2025-07-03), which reduced federal Medicaid spending and added Medicaid work requirements. Voted yes on Breaking the Gridlock Act (H.R. 1834, 2026-01-08), which extended enhanced ACA premium subsidies.

  • Niki Conforti
    —

Faster transition away from fossil fuels

  • Sean Casten
    Recorded votes[15][16][17][23][24]

    Voted no on One Big Beautiful Bill Act (H.R. 1, 2025-05-22; 2025-07-03), which phased out Inflation Reduction Act clean-energy tax credits. Voted yes on Build Back Better Act (H.R. 5376, 2021-11-19; 2022-08-12), which would have funded clean-energy tax credits.

  • Niki Conforti
    —

Raise the minimum wage

  • Sean Casten
    Recorded votes[31]

    Voted yes on Raise the Wage Act (H.R. 582, 2019-07-18).

  • Niki Conforti
    —

Broad tariffs on imported goods

  • Sean Casten
    Recorded votes[27]

    Voted yes on Resolution disapproving tariffs on Canada (H.J. Res. 72, 2026-02-11), which disapproved the tariffs on Canadian imports.

  • Niki Conforti
    Supports[3]

    Says tariffs will help bring back manufacturing and add jobs, though more is needed to stimulate economic growth.

Universal, publicly funded child care

  • Sean Casten
    Recorded votes[23]

    Voted yes on Build Back Better Act (H.R. 5376, 2021-11-19), which would have funded universal pre-K and child-care subsidies.

  • Niki Conforti
    —

Require documentary proof of citizenship to register to vote

  • Sean Casten
    Recorded votes[21]

    Voted no on SAVE Act (H.R. 22, 2025-04-10).

  • Niki Conforti
    —

Require Congress to approve U.S. military action abroad

  • Sean Casten
    Recorded votes[25][26]

    Voted yes on War Powers Resolution on Venezuela (H. Con. Res. 64, 2025-12-17), which would have directed the removal of U.S. forces from hostilities against Venezuela absent congressional authorization. Voted yes on War Powers Resolution directing removal of forces from Iran hostilities (H. Con. Res. 86, 2026-06-03), which directed the removal of U.S. forces from hostilities against Iran absent congressional authorization.

  • Niki Conforti
    —

Research notes & limits

Federal key floor votes and FEC finance totals for Casten are added separately by script. Conforti completed Ballotpedia's 2026 Candidate Connection survey; her positions here are drawn from that survey and from her campaign website as quoted on her Ballotpedia page. Conforti's biography is largely self-described.

Sources · 40

Researched 2026-09-25. Green citations are official government records.

  1. 1.Illinois' 6th Congressional District election, 2026 · Ballotpedia · 2026-09-25 Reference
  2. 2.Sean Casten Candidate Connection survey response · Ballotpedia Candidate Connection survey · 2026-09-25 Candidate's own words
  3. 3.Niki Conforti's campaign website (quoted verbatim on Ballotpedia) · Conforti for Congress campaign website · 2026-02-20 Candidate's own words
  4. 4.Women's Rights — Rep. Sean Casten · Office of Rep. Sean Casten · 2026-10-03 Official record
  5. 5.Gun Violence Prevention — Rep. Sean Casten · Office of Rep. Sean Casten · 2026-10-03 Official record
  6. 6.Casten Statement on Republican Bill to Gut Medicaid · Office of Rep. Sean Casten · 2026-10-03 Official record
  7. 7.Illinois' 6th Congressional District election, 2026 · Ballotpedia · 2026-09-25 Reference
  8. 8.About Sean · Office of Rep. Sean Casten · 2026-10-21 Official record
  9. 9.Sean Casten · Ballotpedia · 2026-10-21 Reference
  10. 10.Illinois U.S. House District 6 election results 2026 · NBC News · 2026-11-09 News report
  11. 11.H.R. 2743, the Raise the Wage Act of 2025 (Raise the Wage Act of 2025) — sponsors and cosponsors · Congress.gov Official record
  12. 12.H.Con.Res. 40 (Directing the President, pursuant to section 5(c) of the War Powers Resolution, to remove United States Armed Forces from hostilities with Iran.) — sponsors and cosponsors · Congress.gov Official record
  13. 13.H.Con.Res. 68 (To direct the removal of United States Armed Forces from Venezuela that have not been authorized by Congress.) — sponsors and cosponsors · Congress.gov Official record
  14. 14.Roll call: Laken Riley Act — final passage · Office of the Clerk, U.S. House · 2025-01-22 Official record
  15. 15.Roll call: One Big Beautiful Bill Act — House passage · Office of the Clerk, U.S. House · 2025-05-22 Official record
  16. 16.H.R. 1 (119th Congress) — One Big Beautiful Bill Act: text and summary · Congress.gov Official record
  17. 17.Roll call: One Big Beautiful Bill Act — final passage · Office of the Clerk, U.S. House · 2025-07-03 Official record
  18. 18.Roll call: Secure the Border Act of 2023 — House passage · Office of the Clerk, U.S. House · 2023-05-11 Official record
  19. 19.Roll call: American Dream and Promise Act of 2019 — House passage · Office of the Clerk, U.S. House · 2019-06-04 Official record
  20. 20.Roll call: American Dream and Promise Act of 2021 — House passage · Office of the Clerk, U.S. House · 2021-03-18 Official record
  21. 21.Roll call: SAVE Act — proof-of-citizenship voter registration · Office of the Clerk, U.S. House · 2025-04-10 Official record
  22. 22.Roll call: Breaking the Gridlock Act — ACA subsidy extension · Office of the Clerk, U.S. House · 2026-01-08 Official record
  23. 23.Roll call: Build Back Better Act — House passage · Office of the Clerk, U.S. House · 2021-11-19 Official record
  24. 24.Roll call: Inflation Reduction Act — final House passage · Office of the Clerk, U.S. House · 2022-08-12 Official record
  25. 25.Roll call: War Powers Resolution on Venezuela · Office of the Clerk, U.S. House · 2025-12-17 Official record
  26. 26.Roll call: War Powers Resolution directing removal of forces from Iran hostilities · Office of the Clerk, U.S. House · 2026-06-03 Official record
  27. 27.Roll call: Resolution disapproving tariffs on Canada · Office of the Clerk, U.S. House · 2026-02-11 Official record
  28. 28.Roll call: Bipartisan Background Checks Act — House passage · Office of the Clerk, U.S. House · 2019-02-27 Official record
  29. 29.Roll call: Assault Weapons Ban of 2022 — House passage · Office of the Clerk, U.S. House · 2022-07-29 Official record
  30. 30.Roll call: Bipartisan Safer Communities Act — final House passage · Office of the Clerk, U.S. House · 2022-06-24 Official record
  31. 31.Roll call: Raise the Wage Act — House passage · Office of the Clerk, U.S. House · 2019-07-18 Official record
  32. 32.Roll call: Women's Health Protection Act of 2021 — House passage · Office of the Clerk, U.S. House · 2021-09-24 Official record
  33. 33.Roll call: Women's Health Protection Act of 2022 — House passage · Office of the Clerk, U.S. House · 2022-07-15 Official record
  34. 34.Niki Conforti · Ballotpedia · 2026-09-25 Reference
  35. 35.Meet Niki · Conforti for Congress · 2026-10-21 Candidate's own words
  36. 36.Niki Conforti's campaign website (quoted verbatim on Ballotpedia) · Conforti for Congress campaign website · 2026-02-20 Candidate's own words
  37. 37.Conforti, Casten, Set For Rematch In 6th Congressional District · Patch · 2026-10-19 News report
  38. 38.U.S. Rep. Sean Casten defeats challenger Niki Conforti in battle over Illinois' 6th Congressional District · Chicago Sun-Times · 2024-11-05 News report
  39. 39.Niki Conforti - 2026 Primary Voter Guide · WTTW News · 2026-03-17 News report
  40. 40.U.S. House, Illinois's 6th District results 2026 · NBC News News report