
U.S. Senator for Massachusetts
Democrat
Senate term end not loaded yet
Missed 0.8% of roll calls. Chamber median 2.1%.
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 1975, 23 terms in total.
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Bills and resolutions Markey signed on to as a cosponsor. An original cosponsor signed on the day the bill was introduced. Source: govinfo bill status files, last updated Nov 6, 2026.
Markey also withdrew as a cosponsor from 1 bill, not listed here.
FERC Greenhouse Gas and Environmental Justice Policy Act of 2025
Sponsor Richard Durbin (D). Original cosponsor. 4 cosponsors. S. 3324 on Congress.gov
Introduced
Family Vaccine Protection Act
Sponsor John Hickenlooper (D). Original cosponsor. 9 cosponsors. S. 3323 on Congress.gov(opens in a new tab)
Introduced
Family Vaccine Protection Act
This bill provides statutory authority for the Advisory Committee on Immunization Practices (ACIP) and establishes related requirements. The bill also conditions the removal of a vaccine from the National Vaccine Injury Compensation Program (VICP) on supportive scientific evidence.
The ACIP provides advice and recommendations to the Centers for Disease Control and Prevention (CDC) on the use of vaccines and immunization strategies in the United States. Currently, the ACIP is governed by a charter. The bill establishes statutory requirements for the ACIP’s membership, procedures, and responsibilities for providing guidance and recommendations on the use of vaccines, including newly authorized vaccines and vaccines in response to public health emergencies.
Also, currently, the CDC reviews and decides whether to adopt the ACIP’s recommendations. The bill requires (1) the CDC to adopt any ACIP recommendation unless the CDC determines it is not supported by a preponderance of the best available scientific evidence, and (2) the Department of Health and Human Services (HHS) or the CDC, as applicable, to publish the scientific basis and notify Congress of any action they take that is contrary to an ACIP recommendation.
The VICP is a no-fault compensation program allowing individuals to seek federal funds for injuries allegedly caused by covered vaccines. Currently, HHS may modify via rulemaking the table of vaccines covered under the VICP. The bill requires any removal of a vaccine from the table to be supported by a preponderance of the best available scientific evidence regarding the vaccine’s safety or efficacy.
Upholding Protections for Unaccompanied Children Act of 2025
Sponsor Catherine Cortez Masto (D). Original cosponsor. 21 cosponsors. S. 3322 on Congress.gov(opens in a new tab)
Introduced
Equal COLA Act
Sponsor Alex Padilla (D). Joined Dec 2, 2025. 20 cosponsors. S. 624 on Congress.gov(opens in a new tab)
Introduced
Mikaela Naylon Give Kids a Chance Act of 2025
Original cosponsor. 37 cosponsors. S. 3302 on Congress.gov(opens in a new tab)
Progress not on file
Mikaela Naylon Give Kids a Chance Act of 2025
This bill authorizes certain targeted clinical trials involving combinations of drugs to treat pediatric cancer, and renews the Food and Drug Administration’s (FDA’s) authority to award priority review vouchers (PRVs) to sponsors of new products for rare pediatric diseases.
Specifically, the bill modifies requirements relating to molecularly targeted pediatric cancer investigations to permit research on new drugs used in combination with active ingredients that have already been approved and that (1) have been determined to be part of the standard of care for treating a pediatric cancer, or (2) have been approved to treat an adult cancer and are directed at molecular targets for pediatric cancer.
The FDA must issue guidance on the implementation of these provisions and report to Congress on its efforts to ensure implementation. The Government Accountability Office (GAO) must report on the effectiveness of the bill's changes with respect to the development of pediatric cancer drugs.
The bill also renews the FDA’s authority to issue PRVs to sponsors of new products intended to treat rare pediatric diseases through September 30, 2030. This is known as the Rare Pediatric Disease PRV program. The program expired in December 2024.
GAO must report on the effectiveness of the Rare Pediatric Disease PRV program, including to what extent PRVs were successful in promoting drug development and expediting patient access to drugs for the treatment or prevention of rare pediatric diseases.
West Bank Violence Prevention Act of 2025
Sponsor Cory Booker (D). Joined Dec 1, 2025. 44 cosponsors. S. 2667 on Congress.gov(opens in a new tab)
Introduced
A resolution supporting the goals and principles of Transgender Day of Remembrance by recognizing the epidemic of violence toward transgender people and memorializing the lives lost this year.
Sponsor Mazie Hirono (D). Original cosponsor. 18 cosponsors. S.Res. 511 on Congress.gov(opens in a new tab)
Introduced
Restoring Food Security for American Families and Farmers Act of 2025
Sponsor Ben Luján (D). Original cosponsor. 46 cosponsors. S. 3281 on Congress.gov(opens in a new tab)
Introduced
John Lewis Every Child Deserves a Family Act
Sponsor Kirsten Gillibrand (D). Original cosponsor. 29 cosponsors. S. 3279 on Congress.gov(opens in a new tab)
Introduced
FSMA Fee Technical Corrections Act
Sponsor Richard Durbin (D). Original cosponsor. 2 cosponsors. S. 3252 on Congress.gov(opens in a new tab)
Introduced
Background Check Expansion Act
Sponsor Christopher Murphy (D). Original cosponsor. 46 cosponsors. S. 3214 on Congress.gov(opens in a new tab)
Introduced
Background Check Expansion Act
This bill establishes new background check requirements for firearm transfers between private parties (i.e., unlicensed individuals).
Specifically, it prohibits a firearm transfer between private parties unless a licensed gun dealer, manufacturer, or importer first takes possession of the firearm to conduct a background check.
The prohibition does not apply to certain firearm transfers, such as a gift between spouses.
EXPERTS Act of 2025
Sponsor Elizabeth Warren (D). Original cosponsor. 12 cosponsors. S. 3210 on Congress.gov(opens in a new tab)
Introduced
A resolution recognizing November 2025 as "National Family Caregivers Month".
Sponsor Susan Collins (R). Original cosponsor. 5 cosponsors. S.Res. 502 on Congress.gov(opens in a new tab)
Passed the Senate
A resolution recognizing National Native American Heritage Month and celebrating the heritages and cultures of Native Americans and the contributions of Native Americans to the United States.
Sponsor Lisa Murkowski (R). Original cosponsor. 46 cosponsors. S.Res. 501 on Congress.gov(opens in a new tab)
Passed the Senate
This resolution recognizes November 2025 as National Native American Heritage Month and the Friday after Thanksgiving as Native American Heritage Day.
Right to Representation for Department of Veterans Affairs Workers Act of 2025
Sponsor Richard Blumenthal (D). Original cosponsor. 10 cosponsors. S. 3196 on Congress.gov(opens in a new tab)
Introduced
Anti-Cash Grab Act
Sponsor Martin Heinrich (D). Original cosponsor. 34 cosponsors. S. 3195 on Congress.gov(opens in a new tab)
Introduced
Bivens Act of 2025
Sponsor Sheldon Whitehouse (D). Original cosponsor. 10 cosponsors. S. 3187 on Congress.gov(opens in a new tab)
Introduced
No Torts for Trump Act
Sponsor Adam Schiff (D). Original cosponsor. 11 cosponsors. S. 3182 on Congress.gov(opens in a new tab)
Introduced
FAST Justice Act
Sponsor Richard Blumenthal (D). Joined Nov 18, 2025. 13 cosponsors. S. 2977 on Congress.gov(opens in a new tab)
Introduced
ROTOR Act
Sponsor Ted Cruz (R). Joined Nov 18, 2025. 21 cosponsors. S. 2503 on Congress.gov(opens in a new tab)
Passed the Senate
Rotorcraft Operations Transparency and Oversight Reform Act or the ROTOR Act
This bill addresses aviation safety by increasing requirements for aircraft tracking and communication using Automatic Dependent Surveillance-Broadcast (ADS-B) technology and expanding oversight.
As background, ADS-B for broadcasting (Out) and receiving (In) transmits information (e.g., location and weather information) between aircraft and air traffic control.
Under the bill, aircraft must generally operate with ADS-B In equipment to provide the aircraft with location information of other aircraft and traffic advisories. Current law does not require this equipment.
Current Federal Aviation Administration (FAA) regulations allow aircraft performing a sensitive government mission to be excepted from requirements for using ADS-B Out equipment. This bill limits which flights may be considered sensitive government missions (e.g., not training flights) and requires additional reporting and notifications for the exception.
The Government Accountability Office must review the use of the ADS-B Out exception and the Office of the Inspector General (OIG) of the Department of Transportation must annually audit FAA oversight of operations that use the exception.
Further, the bill repeals a 2025 law that exempts certain military helicopters from the ADS-B Out requirements for the Washington, DC, metropolitan area.
The bill also requires
• the OIG of the Army to audit the Army’s coordination with the FAA,
• the FAA to establish an office to coordinate airspace usage of military aircraft and review the safety of flight operations and routes around airports, and
• the FAA to enter into memoranda of understanding with military agencies for safety information sharing.
Keep Head Start Funded Act of 2025
Sponsor Tammy Baldwin (D). Original cosponsor. 33 cosponsors. S. 3147 on Congress.gov(opens in a new tab)
Introduced
Keep Head Start Funded Act of 2025
This bill provides FY2026 continuing appropriations to carry out Head Start programs without interruption during any period in which interim or full-year appropriations for FY2026 are not in effect (i.e., a government shutdown).
The Head Start programs provide comprehensive early childhood education and development services to low-income children. The programs seek to promote school readiness through the provision of educational, health, nutritional, social, and other services.
This bill provides FY2026 appropriations to continue projects and activities under the programs that were funded in FY2025. The appropriations are available until the earliest of
• the enactment into law of legislation that provides appropriations (including continuing appropriations) for Head Start,
• the enactment into law of legislation that provides regular or continuing appropriations for the Department of Health and Human Services without an appropriation for Head Start, or
• September 30, 2026.
This bill must take effect as if it had been enacted on September 30, 2025.
Restoring Access for Detainees Act
Sponsor Christopher Murphy (D). Original cosponsor. 22 cosponsors. S. 3146 on Congress.gov(opens in a new tab)
Introduced
Heroes Business Opportunity Act of 2025
Sponsor Jeanne Shaheen (D). Original cosponsor. 1 cosponsor. S. 3136 on Congress.gov(opens in a new tab)
Introduced
A resolution honoring the extraordinary life, leadership, and legacy of Dr. Jane Goodall.
Sponsor Peter Welch (D). Original cosponsor. 17 cosponsors. S.Res. 483 on Congress.gov(opens in a new tab)
Passed the Senate
A joint resolution to direct the removal of United States Armed Forces from hostilities within or against Venezuela that have not been authorized by Congress.
Sponsor Timothy Kaine (D). Joined Nov 5, 2025. 18 cosponsors. S.J.Res. 90 on Congress.gov(opens in a new tab)
Introduced
This joint resolution directs the President to terminate the use of U.S. Armed Forces for hostilities within or against Venezuela unless a declaration of war or authorization to use military force for such purpose has been enacted.
The resolution specifies that it shall not be construed to prevent the United States from defending itself from an armed attack or threat of an imminent armed attack.