Katherine M. Clark

Representative · MA-5 · D

Current term Jan 3, 2025 – Jan 3, 2027 · In the House since Dec 12, 2013

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.

Katherine M. Clark · ChamberLens.org

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Katherine M. Clark

Representative · MA-5 · D

Current term Jan 3, 2025 – Jan 3, 2027 · In the House since Dec 12, 2013

Official website Biographical Directory

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

Working relationships

119th Congress, House.

Bills with other-party backing

—

0 of 3 bills they sponsored had at least one original cosponsor from the other party. Too few to compare (fewer than 5 sponsored bills).

House median 33% · Democrats 33%

Cosponsoring the other party's bills

0 of 26 bills they cosponsored were introduced by a Republican.

House median 15% · Democrats 20%

Voting with own party

99%

On 469 party-line votes, voted with most Democrats 465 times.

House median 98% · Democrats 98%

Voting with the other party

11%

On 525 contested votes, voted the same way as most Republicans 58 times.

House median 11% · Democrats 11%

Closest collaborators

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

All colleagues

Suzanne BonamiciDOR-10 of theirs · 3 of this member's
Jimmy GomezDCA-340 of theirs · 3 of this member's
Jennifer L. McClellanDVA-40 of theirs · 3 of this member's
Brittany PettersenDCO-70 of theirs · 3 of this member's
Jill N. TokudaDHI-20 of theirs · 3 of this member's
Chris PappasDNH-11 of theirs · 1 of this member's
Lauren UnderwoodDIL-141 of theirs · 1 of this member's
Rosa L. DeLauroDCT-32 of theirs · 0 of this member's
Sarah McBrideDDE at-large0 of theirs · 2 of this member's
Ayanna PressleyDMA-72 of theirs · 0 of this member's

Across the aisle (Republicans)

No cosponsorships with Republicans found.

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

Hakeem S. JeffriesDNY-8>99% · 522 of 524
Pete AguilarDCA-3399% · 516 of 522
Betty McCollumDMN-499% · 515 of 521
Julia BrownleyDCA-2699% · 506 of 512
Lori TrahanDMA-399% · 501 of 507

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. Furthest along first.

None of this member's bipartisan bills has passed a chamber yet.

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, House.

Bills with other-party backing

—

0 of 3 bills they sponsored had at least one original cosponsor from the other party. Too few to compare (fewer than 5 sponsored bills).

House median 33% · Democrats 33%

Cosponsoring the other party's bills

0 of 26 bills they cosponsored were introduced by a Republican.

House median 15% · Democrats 20%

Voting with own party

99%

On 469 party-line votes, voted with most Democrats 465 times.

House median 98% · Democrats 98%

Voting with the other party

11%

On 525 contested votes, voted the same way as most Republicans 58 times.

House median 11% · Democrats 11%

Closest collaborators

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

All colleagues

Suzanne BonamiciDOR-10 of theirs · 3 of this member's
Jimmy GomezDCA-340 of theirs · 3 of this member's
Jennifer L. McClellanDVA-40 of theirs · 3 of this member's
Brittany PettersenDCO-70 of theirs · 3 of this member's
Jill N. TokudaDHI-20 of theirs · 3 of this member's
Chris PappasDNH-11 of theirs · 1 of this member's
Lauren UnderwoodDIL-141 of theirs · 1 of this member's
Rosa L. DeLauroDCT-32 of theirs · 0 of this member's
Sarah McBrideDDE at-large0 of theirs · 2 of this member's
Ayanna PressleyDMA-72 of theirs · 0 of this member's

Across the aisle (Republicans)

No cosponsorships with Republicans found.

Voting most alike

Most alike

Hakeem S. JeffriesDNY-8>99% · 522 of 524
Pete AguilarDCA-3399% · 516 of 522
Betty McCollumDMN-499% · 515 of 521
Julia BrownleyDCA-2699% · 506 of 512
Lori TrahanDMA-399% · 501 of 507

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. Furthest along first.

None of this member's bipartisan bills has passed a chamber yet.

Katherine M. Clark

Working relationships

Katherine M. Clark

Working relationships

Closest collaborators

All colleagues

Across the aisle (Republicans)

Voting most alike

Most alike

Bipartisan bills that advanced

Closest collaborators

All colleagues

Across the aisle (Republicans)

Voting most alike

Most alike

Bipartisan bills that advanced

Most alike among Republicans