
U.S. Representative for Massachusetts’s 4th district
Democrat
119th Congress, two-year term
Missed 4.2% of roll calls. Chamber median 1.9%.
The full voting recordCounts roll calls where most Democrats and most Republicans voted differently, leaving out procedural votes.
How we countFrom FEC filings, Voteview roll calls and Congress.gov.
Democrat. In Congress since 2021, 3 terms in total.
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Bills and resolutions where Auchincloss is the primary sponsor. Most bills never leave committee; that is normal for every member. Source: Congress.gov, last updated Oct 29, 2026.
10 of 13 have at least one cosponsor from the other party.
To amend the Federal Food, Drug, and Cosmetic Act and Public Health Service Act to advance the next-generation of clinical development of novel treatments and cures, and for other purposes.
Introduced Oct 22, 2026. 1 cosponsor, 1 from the other party. H.R. 10857 on Congress.gov(opens in a new tab)
Introduced
CCP Fentanyl Sanctions Act
Introduced Aug 24, 2026. 3 cosponsors, 2 from the other party. H.R. 10138 on Congress.gov(opens in a new tab)
Introduced
Alzheimer’s Early Detection Act of 2026
Introduced Jul 22, 2026. 2 cosponsors, 2 from the other party. H.R. 9823 on Congress.gov(opens in a new tab)
Introduced
Hot Rock Act
Introduced Feb 13, 2026. 1 cosponsor, 1 from the other party. H.R. 7568 on Congress.gov(opens in a new tab)
Introduced
To amend the Employee Retirement Income Security Act of 1974 to ensure that pharmacy benefit managers are considered fiduciaries, and for other purposes.
Introduced Dec 18, 2025. 2 cosponsors, 1 from the other party. H.R. 6837 on Congress.gov(opens in a new tab)
Introduced
Pharmacists Fight Back in Medicare and Medicaid Act
Introduced Dec 11, 2025. 41 cosponsors, 25 from the other party. H.R. 6609 on Congress.gov(opens in a new tab)
Introduced
Deepfake Liability Act
Introduced Dec 1, 2025. 1 cosponsor, 1 from the other party. H.R. 6334 on Congress.gov(opens in a new tab)
Introduced
Education Not Endless Scrolling Act
Introduced Dec 1, 2025. 2 cosponsors. H.R. 6335 on Congress.gov(opens in a new tab)
Introduced
Parents Over Platforms Act
Introduced Dec 1, 2025. 1 cosponsor, 1 from the other party. H.R. 6333 on Congress.gov(opens in a new tab)
Introduced
ACA Copay CAP Act of 2025
Introduced Nov 20, 2025. 0 cosponsors. H.R. 6171 on Congress.gov(opens in a new tab)
Introduced
Power of the Mint Act
Introduced Jul 16, 2025. 0 cosponsors. H.R. 4438 on Congress.gov(opens in a new tab)
Introduced
Supporting Transit Commutes Act
Introduced Jan 15, 2025. 8 cosponsors, 1 from the other party. H.R. 409 on Congress.gov(opens in a new tab)
Introduced