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Former member of Congress · last served 109th Congress

Official portrait of Sen. Mark Dayton

Mark Dayton

DEMOCRAT U.S. Senator · MinnesotaSenate 2001–2007

Mark Dayton was a Democratic U.S. senator from Minnesota, first elected to Congress in 2001.

65Bills & resolutions sponsored107th–109th Congress (excludes amendments)
11Passed a chamberof 65 bills & resolutions sponsored
0Became law107th–109th 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

Top bills sponsored

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

Elections Sen. Dayton has won

Sen. Dayton has won 1 U.S. Senate election (2000). Of the contested races, margins ran from 5.5 to 5.5 points.

010204060Margin of victory, points (axis starts at 0)2000, MN Senate: won by 5.5 points2000MN Senate
Democratic winRepublican winseat changed partyunopposed
Elections won1 in the data (1976–2024); losses are not listed
Closest win: 5.5 points2000, MN Senate
Won an open seat or took one from the other party1 of 1 elections (open seat or changed party)
Seat history, Minnesota Senate (class 1)Winners in regular elections, most recent three: Rod Grams (R) 1994 → Mark Dayton (D) 2000 → Amy Klobuchar (D) 2006–2024.

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 Minnesota done while Sen. Dayton served?

2005 to 2006 in Minnesota: typical household income was about the same after inflation, the share of people below the poverty line was up 0.6 points, and the share of workers looking for a job was down 0.3 points.

Typical household income · after inflationMinnesota $84.5KU.S. $75.8K
Minnesota: $84.0K in 2005 → $84.5K in 2006
Minnesota about the sameU.S. up 1%
Share of people below the poverty lineU.S. 13.3%Minnesota 9.8%
Minnesota: 9.2% in 2005 → 9.8% in 2006
Minnesota up 0.6 pointsU.S. about the same
Share of workers looking for a jobU.S. 6.4%Minnesota 5.2%
Minnesota: 5.5% in 2005 → 5.2% in 2006
Minnesota down 0.3 pointsU.S. down 0.5 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. Oxblood = state, grey = U.S.

While they served, not because of them. This shows what happened in Minnesota during Dayton’s time representing it (2001 to 2007). It does not say what the member did or caused. It is not a score, and PORKER never ranks members on it.

Survey years start at 2005. The yearly estimates for Minnesota begin in 2005, so 2001 to 2004 are not shown. No 2020 yearly estimate exists.

See the full 20-year record →Source: U.S. Census Bureau, American Community Survey 1-year estimates (tables B19013, B17001, B23001) and BLS CPI-U-RS for inflation, retrieved October 18, 2026. “About the same” means the change is inside the 90% margins of error. Who held the seat: Congress.gov member service records, year level.

Official records on bills this member sponsored

109th Congress. What Congress.gov lists for the 16 bills sponsored.

RecordBillsSource
Bills sponsored16Source: Congress.gov member record, PORKER copy of October 26, 2026 ↗ See them →
With a CBO cost estimate listed0None listed
With a committee report listed0None listed
Evidence
How counted
Bills where this member is the lead (first-listed) sponsor in the 109th 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.

Open full dossier →

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