Susan M. Collins

Born 1952-12-07 | Republican | ME

Photo of Susan M. Collins

Ideology score (-1 = most liberal, +1 = most conservative): 117th Senate: +0.12 (more conservative than 50% of the chamber); 118th Senate: +0.12 (more conservative than 53% of the chamber); 119th Senate: +0.12 (more conservative than 45% of the chamber) What is this?

CongressChamberStatePartyVotes castMissedMissed %Party votesWith partyUnity %SponsoredBecame lawLaw %
117thSenateMERepublican94900.076827235.44312.3
118thSenateMERepublican69100.053621840.72727.4
119thSenateMERepublican91500.084070083.32214.5

Key votes

VoteDateResultHow they votedMatched party majority?
Government funding law ending the 2025 shutdown (Senate)2025-11-10Bill PassedYeaYes
One Big Beautiful Bill Act (Senate)2025-07-01Bill PassedNayNo
GENIUS Act (Senate)2025-06-17Bill PassedYeaYes
Laken Riley Act (Senate)2025-01-20Bill PassedYeaYes
Ukraine, Israel and Taiwan security funding (Senate)2024-02-13Bill PassedYeaNo
Fiscal Responsibility Act (Senate)2023-06-01Bill PassedYeaNo
Respect for Marriage Act (Senate)2022-11-29Bill PassedYeaNo
Inflation Reduction Act (Senate)2022-08-07Bill PassedNayYes
Honoring our PACT Act (Senate)2022-06-16Bill PassedYeaYes
Infrastructure Investment and Jobs Act (Senate)2021-08-10Bill PassedYeaNo
American Rescue Plan Act (Senate)2021-03-06Bill PassedNayYes

About these votes

Voting patterns

CongressChamberAgainst both parties% of votes where parties agreedWith winning side %Close votesVoted onMissed
117thSenate31.783.53003000
118thSenate10.774.61911910
119thSenate45.488.23593590

Votes most like theirs (119th Congress, Senate)

MemberPartyStateAgreement
Lisa MurkowskiRAK89.1%
Markwayne MullinROK87.7%
Dan SullivanRAK86.1%
Chuck GrassleyRIA85.9%
Mitch McConnellRKY85.6%

Votes least like theirs (119th Congress, Senate)

MemberPartyStateAgreement
Edward J. MarkeyDMA17.5%
Elizabeth WarrenDMA18.0%
Christopher MurphyDCT18.8%
Bernard SandersDVT18.9%
Chris Van HollenDMD19.8%

Against both parties counts votes where the Democratic and Republican majorities took the same side and the member voted the other way. With winning side counts votes that matched the final outcome. A close vote is a roll call decided by 5 votes or fewer; absences can have many causes. Agreement is the share of votes both members cast on which they voted the same way (at least 100 shared votes). Independents who caucus with a party count as part of it, and delegates are left out of the party tallies. Counts cover members in this site's data and may differ slightly from official tallies.

Cosponsorship

CongressCosponsoredAcross partyAcross %Avg cosponsors on own billsOwn bills with other-party cosponsorShare %
117th39928270.77.84195.3
118th32521164.98.22696.3
119th23413658.19.32195.5

Cosponsorship counts bills and joint resolutions only. A cosponsorship is across party lines when the cosponsor and the bill's sponsor are in different parties; independents who caucus with a party count as part of it, and members outside both caucuses are left out of the percentages. Totals can differ slightly from Congress.gov because of withdrawn cosponsors. The 119th Congress is still in progress.

A party vote is a roll call where the Democratic and Republican majorities took opposite sides. Unity % is how often the member sided with their own party's majority on those votes. Sponsored counts bills and joint resolutions only. Became law means the bill itself was enacted; bills whose text was folded into other legislation are not counted. The 119th Congress is still in progress.

In the news

Senate confirms Todd Blanche as attorney general, 50-49

NPR (via IJPR) | Aug 08, 2026 | Members: Susan M. Collins, Lisa Murkowski, Bill Cassidy, John Cornyn, Thom Tillis

The Senate confirmed Todd Blanche, who had been acting attorney general since April, in a pre-dawn vote. Republican Sens. Susan Collins and Lisa Murkowski voted no with all Democrats, and Sen. Bill Cassidy's last-minute yes supplied the deciding vote. Sens. John Cornyn and Thom Tillis had earlier held up the Judiciary Committee vote until Blanche put in writing that a proposed anti-weaponization fund was dead.

Senate adopts Iran war powers resolution 50-48

CNN (via KRDO) | Jun 23, 2026 | Members: Susan M. Collins, Lisa Murkowski, Bill Cassidy, Rand Paul, John Fetterman, Mitch McConnell, Gregory W. Meeks

The Senate approved a House-passed resolution directing the president to remove U.S. forces from hostilities with Iran. Republican Sens. Susan Collins, Lisa Murkowski, Bill Cassidy and Rand Paul joined Democrats, while Democratic Sen. John Fetterman voted no, and Republican absences helped it pass. The White House said a concurrent resolution has no force of law, while its House sponsor, Rep. Gregory Meeks, says it is binding.

Summaries are short and written in our own words from the linked article. They may leave out context, so follow the link to read the original. A story appearing here is not an endorsement.