Former member of Congress · last served 118th Congress
Jeff Duncan
Jeff Duncan was a Republican U.S. representative from South Carolina, first elected to Congress in 2011, who voted with most Republicans on 94% of the 112th Congress’s yes/no votes and sponsored 2 bills that became law (113th–118th Congress).
How we count: “Broke with party” is a yes/no roll call where the member voted against most of their own party on that vote (party as recorded; even splits not counted). “Pork: own share” splits each earmark shared by several members evenly among them.
5 most recent votes
- NayOn Motion to Concur in the Senate Amendments — American Taxpayer Relief Act of 2012Jan 1, 2013 · Passed
- YeaOn Agreeing to the Resolution — Providing for consideration of the Senate amendments to the bill (H.R. 8) to extend certain tax relief provisions enacted in 2001 and…Jan 1, 2013 · Passed
- NayOn Motion to Suspend the Rules and Concur in the Senate Amendment — Drywall Safety Act of 2012Jan 1, 2013 · Passed
- YeaOn Motion to Suspend the Rules and Concur in the Senate Amendment — To provide for the conveyance of certain property from the United States to the Maniilaq Association located in Kotzebue, Alaska.Jan 1, 2013 · Passed
- YeaOn Motion to Suspend the Rules and Pass — Congressional Pay Freeze and Fiscal Responsibility ActJan 1, 2013 · Passed
5 most recent bills
- H.R. 3293 Expediting Federal Broadband Deployment Reviews ActDec 17, 2024 · Received in the Senate and Read twice and referred to the Committee on Commerce, Science, and Transportation.
- H.R. 2829 Chronic Care Management Improvement Act of 2023Dec 17, 2024 · Referred to the Subcommittee on Health.
- H.R. 779 No Social Security for Illegal Aliens Act of 2023Dec 17, 2024 · Referred to the Subcommittee on Social Security.
- H.R. 497 Freedom for Health Care Workers ActDec 17, 2024 · Referred to the Subcommittee on Health.
- H.R. 152 Hearing Protection ActDec 17, 2024 · Referred to the Subcommittee on Health.
Top bills sponsored
- H.R. 3783 (112th) Countering Iran in the Western Hemisphere Act of 2012Became law
- H.R. 91 (117th) To designate the facility of the United States Postal Service located at 810 South Pendleton Street in Easley, South Carolina, as the "Private First Class…Became law
- H.R. 92 (117th) To designate the facility of the United States Postal Service located at 110 Johnson Street in Pickens, South Carolina, as the "Specialist Four Charles…Became law
- H.R. 1121 (118th) Protecting American Energy Production ActPassed a chamber
- H.Res. 357 (115th) Reaffirming the strategic partnership between the United States and Canada, recognizing bilateral cooperation that advances United States national interests…Passed a chamber
- H.R. 1613 (113th) Outer Continental Shelf Transboundary Hydrocarbon Agreements Authorization ActPassed a chamber
- H.R. 4228 (113th) DHS Acquisition Accountability and Efficiency ActPassed a chamber
- H.R. 6544 (118th) Atomic Energy Advancement ActPassed a chamber
Laws first, then bills that passed a chamber, were reported from committee, or drew the most cosponsors.
Elections Rep. Duncan has won
Rep. Duncan has won 7 U.S. House elections (2010–2022). Of the contested races, margins ran from 26.3 to 45.8 points.
Full election history for this seat →
Source: MIT Election Data and Science Lab, U.S. House V15 / U.S. Senate V8 (CC0), retrieved 2026-10-18; winners matched to member records by seat and term. Results run through the 2024 elections; nothing from 2026 is shown until it is certified. A margin is a fact about one election, never a score of how well a member represents anyone, and PORKER does not rank members by it.
How has South Carolina’s 3rd district done while Rep. Duncan served?
2012 to 2021 in SC-3: typical household income was up 21% after inflation, the share of people below the poverty line was down 2.4 points, and the share of workers looking for a job was down 7.6 points.
Each mini chart has its own scale, fitted to its lines (it does not start at zero), so compare the numbers, not the heights. Teal = district, oxblood = state, grey = U.S.
While they served, not because of them. This shows what happened in South Carolina’s 3rd district during Duncan’s time representing it (2011 to 2025). It does not say what the member did or caused. It is not a score, and PORKER never ranks members on it.
Only one set of district lines is shown. SC-3 was redrawn in 2012 and again in 2022, and a redrawn district is a different place. So this card shows only the longest stretch on the same lines during the term, 2012 to 2021 (no 2020 yearly estimate), not the full 2011 to 2025.
Official records on bills this member sponsored
118th Congress. What Congress.gov lists for the 28 bills sponsored.
| Record | Bills | Source |
|---|---|---|
| Bills sponsored | 28 | Source: Congress.gov member record, PORKER copy of October 26, 2026 ↗ See them → |
| With a sponsor’s constitutional-authority statement | 26 | See the 26 → |
| With a CBO cost estimate listed | 5 | See the 5 → |
| With a committee report listed | 4 | See the 4 → |
Evidence
- How counted
- Bills where this member is the lead (first-listed) sponsor in the 118th Congress, read from the stored Congress.gov bill records
- Fields
- cboCostEstimates, committeeReports, constitutionalAuthorityStatementText, notes
- PORKER copy refreshed
- October 26, 2026 (nightly)
Read this first. These are counts of records Congress.gov lists. Many bills never get a CBO estimate or a report, so a zero is not a mark against a member. We never show this as a score.
Data as of Oct 26, 2026 · latest recorded House vote Sep 16, 2026 · Sources: Congress.gov, Senate.gov, House Clerk, Appropriations Committee earmark tables. PORKER is non-partisan.