Dan Sullivan

Senator · AK · R

Current term Jan 3, 2021 – Jan 3, 2027 · In the Senate since Jan 6, 2015

Official website Contact form Biographical Directory

Portrait: U.S. Government Publishing Office, via unitedstates/images (public domain)

Working relationships

How often this member works with colleagues across party lines, from bill sponsorships and recorded votes in this Congress. Bills are H.R., S., H.J.Res. and S.J.Res.; resolutions, post office namings, and Congressional Gold Medal and commemorative coin bills are left out. Independents are counted with the party they caucus with. These figures describe the public record; they do not measure effectiveness or ideology.

Dan Sullivan · ChamberLens.org

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Dan Sullivan

Senator · AK · R

Current term Jan 3, 2021 – Jan 3, 2027 · In the Senate since Jan 6, 2015

Official website Contact form Biographical Directory

Portrait: U.S. Government Publishing Office, via unitedstates/images (public domain)

Working relationships

119th Congress, Senate.

Bills with other-party backing

44%

27 of 61 bills they sponsored had at least one original cosponsor from the other party.

Senate median 41% · Republicans 43%

Cosponsoring the other party's bills

25%

53 of 210 bills they cosponsored were introduced by a Democrat.

Senate median 19% · Republicans 18%

Voting with own party

96%

On 815 party-line votes, voted with most Republicans 783 times.

Senate median 99% · Republicans >99%

Voting with the other party

On 866 contested votes, voted the same way as most Democrats 80 times.

Senate median 6% · Republicans 6%

Closest collaborators

Counted both ways: bills by the colleague that this member cosponsored, and bills by this member that the colleague cosponsored.

All colleagues

Lisa MurkowskiRAK26 of theirs · 24 of this member's
Steve DainesRMT8 of theirs · 8 of this member's
Pete RickettsRNE5 of theirs · 9 of this member's
Rick ScottRFL4 of theirs · 8 of this member's
Marsha BlackburnRTN3 of theirs · 9 of this member's
Ted CruzRTX9 of theirs · 3 of this member's
Jeff MerkleyDOR5 of theirs · 6 of this member's
Mike CrapoRID7 of theirs · 4 of this member's
John CornynRTX5 of theirs · 5 of this member's
Ted BuddRNC3 of theirs · 7 of this member's

Across the aisle (Democrats)

Jeff MerkleyDOR5 of theirs · 6 of this member's
Sheldon WhitehouseDRI1 of theirs · 6 of this member's
Christopher A. CoonsDDE3 of theirs · 3 of this member's
Amy KlobucharDMN3 of theirs · 3 of this member's
Maria CantwellDWA4 of theirs · 2 of this member's
Mazie K. HironoDHI

Voting most alike

Contested roll calls (at least 10% of yea and nay votes on the losing side) on which both voted yea or nay, and how often they made the same choice. Colleagues who shared too few of these votes with this member are not ranked.

Most alike

Markwayne MullinROK · former98% · 642 of 657
Jon HustedROH97% · 833 of 861
Chuck GrassleyRIA96% · 814 of 844
Cindy Hyde-SmithRMS96% · 819 of 851
Tom CottonRAR96% · 822 of 855

Bipartisan bills that advanced

Bills this member sponsored or joined as an original cosponsor, with original backers from both parties, that passed at least one chamber (12). Furthest along first.

Became lawS. 216Save Our Seas 2.0 Amendments Act
Sponsor · original backers: 1 D, 1 R · became law Dec 26, 2025
Became lawS. 356Secure Rural Schools Reauthorization Act of 2025
Original cosponsor · sponsored by Mike Crapo · original backers: 10 D, 11 R · became law Dec 18, 2025
Passed the SenateS. 4822Saving the OOI Act of 2026
Original cosponsor · sponsored by Lisa Murkowski · original backers: 10 D, 2 R · passed the Senate Jun 17, 2026
Passed the SenateS. 4460Rural Community Hospital Demonstration Program Reauthorization
Original cosponsor · sponsored by Chuck Grassley · original backers: 8 D, 8 R · passed the Senate May 20, 2026
Passed the SenateS. 688Fighting Foreign Illegal Seafood Harvests Act of 2025
Sponsor · original backers: 1 D, 1 R · passed the Senate Mar 22, 2026

Each member's party on each date comes from congress-legislators term records. Party-line votes are roll calls on which most voting Democrats and most voting Republicans took opposite sides; procedural votes are included. The Vice President's tie-breaking votes and impeachment verdicts are not counted, and a bill enacted as part of another bill counts only at the stage it reached on its own. Medians include everyone who served in the chamber this Congress with enough records (5 sponsored bills, 10 cosponsorships, 25 votes). Computed Oct 23, 2026, 11:51 AM ET from Congress.gov and House and Senate roll calls.

119th Congress, Senate.

Bills with other-party backing

44%

27 of 61 bills they sponsored had at least one original cosponsor from the other party.

Senate median 41% · Republicans 43%

Cosponsoring the other party's bills

25%

53 of 210 bills they cosponsored were introduced by a Democrat.

Senate median 19% · Republicans 18%

Voting with own party

96%

On 815 party-line votes, voted with most Republicans 783 times.

Senate median 99% · Republicans >99%

Voting with the other party

On 866 contested votes, voted the same way as most Democrats 80 times.

Senate median 6% · Republicans 6%

Closest collaborators

Counted both ways: bills by the colleague that this member cosponsored, and bills by this member that the colleague cosponsored.

All colleagues

Lisa MurkowskiRAK26 of theirs · 24 of this member's
Steve DainesRMT8 of theirs · 8 of this member's
Pete RickettsRNE5 of theirs · 9 of this member's
Rick ScottRFL4 of theirs · 8 of this member's
Marsha BlackburnRTN3 of theirs · 9 of this member's
Ted CruzRTX9 of theirs · 3 of this member's
Jeff MerkleyDOR5 of theirs · 6 of this member's
Mike CrapoRID7 of theirs · 4 of this member's
John CornynRTX5 of theirs · 5 of this member's
Ted BuddRNC3 of theirs · 7 of this member's

Across the aisle (Democrats)

Jeff MerkleyDOR5 of theirs · 6 of this member's
Sheldon WhitehouseDRI1 of theirs · 6 of this member's
Christopher A. CoonsDDE3 of theirs · 3 of this member's
Amy KlobucharDMN3 of theirs · 3 of this member's
Maria CantwellDWA4 of theirs · 2 of this member's
Mazie K. HironoDHI

Voting most alike

Most alike

Markwayne MullinROK · former98% · 642 of 657
Jon HustedROH97% · 833 of 861
Chuck GrassleyRIA96% · 814 of 844
Cindy Hyde-SmithRMS96% · 819 of 851
Tom CottonRAR96% · 822 of 855

Bipartisan bills that advanced

Bills this member sponsored or joined as an original cosponsor, with original backers from both parties, that passed at least one chamber (12). Furthest along first.

Became lawS. 216Save Our Seas 2.0 Amendments Act
Sponsor · original backers: 1 D, 1 R · became law Dec 26, 2025
Became lawS. 356Secure Rural Schools Reauthorization Act of 2025
Original cosponsor · sponsored by Mike Crapo · original backers: 10 D, 11 R · became law Dec 18, 2025
Passed the SenateS. 4822Saving the OOI Act of 2026
Original cosponsor · sponsored by Lisa Murkowski · original backers: 10 D, 2 R · passed the Senate Jun 17, 2026
Passed the SenateS. 4460Rural Community Hospital Demonstration Program Reauthorization
Original cosponsor · sponsored by Chuck Grassley · original backers: 8 D, 8 R · passed the Senate May 20, 2026
Passed the SenateS. 688Fighting Foreign Illegal Seafood Harvests Act of 2025
Sponsor · original backers: 1 D, 1 R · passed the Senate Mar 22, 2026

Dan Sullivan

Working relationships

Dan Sullivan

Working relationships

Closest collaborators

All colleagues

Across the aisle (Democrats)

Voting most alike

Most alike

Bipartisan bills that advanced

Closest collaborators

All colleagues

Across the aisle (Democrats)

Voting most alike

Most alike

Bipartisan bills that advanced

Most alike among Democrats