
U.S. Senator for Maryland
Democrat
Senate term end not loaded yet
Missed 1.5% 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 2003, 9 terms in total.
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Bills and resolutions Van Hollen 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.
Van Hollen also withdrew as a cosponsor from 2 bills, not listed here.
Prohibiting Unauthorized Military Action in Venezuela Act of 2025
Sponsor Jeff Merkley (D). Original cosponsor. 9 cosponsors. S. 3344 on Congress.gov
Introduced
A resolution condemning the Government of Iran's state-sponsored persecution of the Baha'i minority and its continued violation of the International Covenants on Human Rights.
Sponsor Ron Wyden (D). Original cosponsor. 30 cosponsors. S.Res. 525 on Congress.gov(opens in a new tab)
Introduced
This resolution condemns Iran's state-sponsored persecution of the Baha'i religious minority and Iran's continued violation of international human rights treaties. The resolution calls on Iran to (1) immediately release Baha'is and others imprisoned or detained solely on account of religion, (2) end its state-sponsored campaign of hate propaganda against the Baha'is, and (3) reverse certain policies that discriminate against Baha'is and other religious minorities. The resolution also urges the President and the Department of State to impose sanctions on Iranian officials and others who are responsible for serious human rights abuses, including abuses against Iran's Baha'i community.
Temporary Immigration Judge Integrity Act
Sponsor Adam Schiff (D). Original cosponsor. 17 cosponsors. S. 3326 on Congress.gov(opens in a new tab)
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.
A concurrent resolution recognizing the 30th anniversary of the Dayton Peace Accords.
Sponsor Jeanne Shaheen (D). Original cosponsor. 6 cosponsors. S.Con.Res. 24 on Congress.gov(opens in a new tab)
Introduced
Saving Lives and Taxpayer Dollars Act
Sponsor Jeanne Shaheen (D). Joined Dec 2, 2025. 13 cosponsors. S. 2252 on Congress.gov(opens in a new tab)
Passed committee
Strengthening Protections for Domestic Violence and Stalking Survivors Act of 2025
Sponsor Amy Klobuchar (D). Joined Dec 1, 2025. 17 cosponsors. S. 2196 on Congress.gov(opens in a new tab)
Introduced
Strengthening Protections for Domestic Violence and Stalking Survivors Act of 2025
This bill extends federal restrictions on the receipt, possession, shipment, and transportation of firearms and ammunition to new types of stalking and domestic violence offenders.
Specifically, the bill extends federal firearms-related restrictions to individuals who are convicted of a misdemeanor crime of stalking. The term misdemeanor crime of stalking means a federal, state, tribal, or local offense involving harassment, intimidation, or surveillance that (1) causes emotional distress; or (2) places a person in reasonable fear of harm to themselves, an immediate family member, a current or former cohabitant, an intimate partner, or a pet.
Additionally, the bill extends federal firearms-related restrictions to individuals who are subject to a domestic violence protection order that restrains them from harassing, stalking, or threatening a current or former dating partner (regardless of when the relationship occurred) or an individual similarly situated to a spouse. Currently, the restrictions only apply if the domestic violence protection order restrains the individual from harassing, stalking, or threatening a co-parent, a current or former spouse, or a current or former cohabitant.
Finally, the bill extends federal firearms-related restrictions to individuals who commit a misdemeanor crime of domestic violence against the child of a current or recent former dating partner. Currently, the restrictions only apply if the offense is committed against a current or recent former dating partner.
A resolution designating October 2025 as "National Principals Month".
Sponsor Tina Smith (D). Original cosponsor. 5 cosponsors. S.Res. 518 on Congress.gov(opens in a new tab)
Passed the Senate
A resolution designating November 22, 2025, as National Adoption Day and November 2025 as National Adoption Month to promote national awareness of adoption and the children awaiting families, celebrating children and families involved in adoption, and encouraging the people of the United States to secure safety, permanency, and well-being for all children.
Sponsor Kevin Cramer (R). Original cosponsor. 31 cosponsors. S.Res. 513 on Congress.gov(opens in a new tab)
Passed the Senate
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
Healthy MOM Act
Sponsor Angela Alsobrooks (D). Original cosponsor. 14 cosponsors. S. 3274 on Congress.gov(opens in a new tab)
Introduced
Ending Forced Arbitration of Race Discrimination Act of 2025
Sponsor Cory Booker (D). Original cosponsor. 9 cosponsors. S. 3243 on Congress.gov(opens in a new tab)
Introduced
Ending Forced Arbitration of Race Discrimination Act of 2025
This bill prohibits a predispute arbitration agreement or predispute joint-action waiver from being valid or enforceable with respect to a case relating to a race discrimination dispute at the election of the person alleging the discrimination.
A resolution expressing support for the designation of November 20, 2025, through December 20, 2025, as "National Survivors of Homicide Victims Awareness Month".
Sponsor Edward Markey (D). Original cosponsor. 2 cosponsors. S.Res. 504 on Congress.gov(opens in a new tab)
Introduced
This resolution expresses support for the designation of November 20-December 20, 2025, as National Survivors of Homicide Victims Awareness Month.
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.
Recognizing the Role of Direct Support Professionals Act
Sponsor Maggie Hassan (D). Original cosponsor. 10 cosponsors. S. 3211 on Congress.gov(opens in a new tab)
Passed committee
EXPERTS Act of 2025
Sponsor Elizabeth Warren (D). Original cosponsor. 12 cosponsors. S. 3210 on Congress.gov(opens in a new tab)
Introduced
NOPAIN for Veterans Act
Sponsor Shelley Capito (R). Original cosponsor. 27 cosponsors. S. 3209 on Congress.gov(opens in a new tab)
Introduced
End Rent Fixing Act of 2025
Sponsor Ron Wyden (D). Original cosponsor. 12 cosponsors. S. 3207 on Congress.gov(opens in a new tab)
Introduced
Preventive Health Savings Act
Sponsor Angus King (I). Original cosponsor. 3 cosponsors. S. 3204 on Congress.gov(opens in a new tab)
Introduced
Preventive Health Savings Act
This bill requires the Congressional Budget Office (CBO), upon receiving a request from Congress, to determine if proposed legislation would reduce spending outside of the 10-year budget window through the use of preventive health care.
Under the bill, the term preventive health care generally refers to an action that focuses on the health of the public, individuals, and defined populations in order to protect, promote, and maintain health and wellness and prevent disease, disability, and premature death.
If CBO determines that the proposed legislation would result in net reductions in budget outlays from the use of preventive health care, any CBO projection regarding the legislation must include (1) a description and estimate of the reductions in outlays, and (2) a description of the basis for these conclusions.
Any estimate provided by CBO pursuant to this bill must be used as a supplementary estimate and may not be used to determine compliance with the Congressional Budget Act of 1974 or any other budgetary enforcement controls.
Keeping Deposits Local Act
Sponsor Mike Rounds (R). Joined Nov 19, 2025. 4 cosponsors. S. 2757 on Congress.gov(opens in a new tab)
Introduced
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