Former member of Congress · last served 104th Congress

Mark O. Hatfield

REPUBLICAN U.S. Senator · OregonSenate 1967–1997

Mark Hatfield was a Republican U.S. senator from Oregon, first elected to Congress in 1967, who sponsored 10 bills that became law (100th–104th Congress).

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164Bills & resolutions sponsored100th–104th Congress (excludes amendments)

29Passed a chamberof 164 bills & resolutions sponsored

10Became law10 substantive + 0 ceremonial · 100th–104th Congress

—Broke with partyNo roll calls in PORKER’s records (they start in 2011)

—Missed votesNo roll calls in PORKER’s records (they start in 2011)

—Pork: own shareFY2024 earmarks: not in office

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.

Recent votes

No recorded roll-call votes in PORKER’s records. Roll-call records start in 2011.

5 most recent bills

S. 1577 A bill to authorize appropriations for the National Historical Publications and Records Commission for fiscal years 1998, 1999, 2000, and 2001.
Oct 9, 1996 · Became Public Law No: 104-274.
S.Res. 320 A resolution authorizing the printing of a Senate document.
Oct 3, 1996 · Submitted in the Senate, considered, and agreed to without amendment by Unanimous Consent. (consideration: CR S12368-12369)
S. 2166 Local Empowerment and Flexibility Pilot Act of 1996
Sep 30, 1996 · Read twice and referred to the Committee on Governmental Affairs.
S. 1986 Umatilla Basin Project Completion Act
Sep 30, 1996 · By Senator Murkowski from Committee on Energy and Natural Resources filed written report. Report No. 104-387.
S. 1183 Davis-Bacon Act Reform Amendments of 1995
Sep 30, 1996 · Sponsor introductory remarks on measure. (CR S12006-12007)

Top bills sponsored

Laws first, then bills that passed a chamber, were reported from committee, or drew the most cosponsors.

Elections Sen. Hatfield has won

Sen. Hatfield has won 3 U.S. Senate elections (1978, 1984, 1990). Of the contested races, margins ran from 7.5 to 33.1 points.

Democratic winRepublican winseat changed partyunopposed

Elections won3 in the data (1976–2024); losses are not listed

Closest win: 7.5 points1990, OR Senate

Won an open seat or took one from the other party0 of 3 elections (open seat or changed party)

Seat history, Oregon Senate (class 2)Winners in regular elections, most recent three: Mark Hatfield (R) 1978–1990 → Gordon Smith (R) 1996–2002 → Jeff Merkley (D) 2008–2020. The seat is next on the ballot in 2026.

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.

Official records on bills this member sponsored

104th Congress. What Congress.gov lists for the 42 bills sponsored.

Record	Bills	Source
Bills sponsored	42	Source: Congress.gov member record, PORKER copy of October 26, 2026 ↗ See them →
With a CBO cost estimate listed	0	None listed
With a committee report listed	10	See the 10 →

Evidence

How counted: Bills where this member is the lead (first-listed) sponsor in the 104th 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.

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Data as of Oct 26, 2026 · Sources: Congress.gov, Senate.gov, House Clerk, Appropriations Committee earmark tables. PORKER is non-partisan.