
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.
Mikaela Naylon Give Kids a Chance Act of 2025
Joined Jan 29, 2026. 37 cosponsors. S. 3302 on Congress.gov
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.
Addressing Climate Financial Risk Act of 2026
Sponsor Tina Smith (D). Original cosponsor. 5 cosponsors. S. 3711 on Congress.gov(opens in a new tab)
Introduced
MAP for Care Act
Sponsor Bill Cassidy (R). Joined Jan 27, 2026. 3 cosponsors. S. 3473 on Congress.gov(opens in a new tab)
Introduced
A resolution honoring the life, achievements, and legacy of Ben Nighthorse Campbell.
Sponsor Michael Bennet (D). Original cosponsor. 99 cosponsors. S.Res. 585 on Congress.gov(opens in a new tab)
Passed the Senate
No Taxpayer Funds for Corporate Investment in Venezuelan Oil Act
Sponsor Michael Bennet (D). Original cosponsor. 6 cosponsors. S. 3685 on Congress.gov(opens in a new tab)
Introduced
No Political Enemies Act
Sponsor Christopher Murphy (D). Original cosponsor. 10 cosponsors. S. 3646 on Congress.gov(opens in a new tab)
Introduced
SERVE Act
Sponsor Bernie Sanders (I). Original cosponsor. 11 cosponsors. S. 3622 on Congress.gov(opens in a new tab)
Introduced
Protecting Taxpayers from Risky Investments in Venezuela Act
Sponsor Jeff Merkley (D). Original cosponsor. 6 cosponsors. S. 3621 on Congress.gov(opens in a new tab)
Introduced
A concurrent resolution recognizing the 15th anniversary of the January 8, 2011, Tucson, Arizona, shooting and honoring the survivors and victims, including former Congresswoman Gabby Giffords, a gun violence survivor and one of the most influential voices of courage in the United States in the fight to end gun violence.
Sponsor Kirsten Gillibrand (D). Original cosponsor. 41 cosponsors. S.Con.Res. 25 on Congress.gov(opens in a new tab)
Passed the Senate
RISE Act
Sponsor Jim Banks (R). Original cosponsor. 11 cosponsors. S. 3589 on Congress.gov(opens in a new tab)
Passed committee
A resolution observing the fifth anniversary of the attack on the United States Capitol on January 6, 2021, and recognizing the essential work of United States Capitol personnel, including the United States Capitol Police.
Sponsor Alex Padilla (D). Original cosponsor. 35 cosponsors. S.Res. 574 on Congress.gov(opens in a new tab)
Introduced
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 Jan 6, 2026. 30 cosponsors. S.J.Res. 98 on Congress.gov(opens in a new tab)
Passed the Senate
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 joint 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.
No Rewards for January 6 Rioters Act
Sponsor Alex Padilla (D). Original cosponsor. 25 cosponsors. S. 3582 on Congress.gov(opens in a new tab)
Introduced
No Settlements for January 6 Law Enforcement Assaulters Act
Sponsor Sheldon Whitehouse (D). Original cosponsor. 24 cosponsors. S. 3581 on Congress.gov(opens in a new tab)
Introduced
A bill to amend the Internal Revenue Code of 1986 to modify the railroad track maintenance credit.
Sponsor Mike Crapo (R). Joined Jan 5, 2026. 48 cosponsors. S. 1532 on Congress.gov(opens in a new tab)
Introduced
This bill increases the annual limit on the tax credit for qualified railroad track maintenance expenses (also referred to as the short line railroad tax credit) and expands eligibility for claiming the credit.
Under current law, the tax credit is limited each tax year to $3,500 multiplied by the sum of the number of miles of railroad track owned or leased by the taxpayer (miles owned or leased) and the number of railroad track miles assigned to the taxpayer by a Class II or III railroad (miles assigned). This bill increases the annual limit to $6,100 multiplied by the sum of miles owned or leased and miles assigned. The $6,100 amount used in the calculation of the tax credit limit is adjusted for inflation for tax years beginning after 2025.
The bill also expands eligibility for the tax credit to include gross expenses for maintaining railroad tracks owned or leased as of January 1, 2024. Under current law, the tax credit is limited to gross expenses for maintaining railroad tracks owned or leased as of January 1, 2015.
Buy Now, Pay Later Protection Act of 2025
Sponsor John Reed (D). Original cosponsor. 4 cosponsors. S. 3561 on Congress.gov(opens in a new tab)
Introduced
Support Our Troops Shipping Relief Act of 2025
Sponsor Richard Blumenthal (D). Joined Dec 18, 2025. 1 cosponsor. S. 3477 on Congress.gov(opens in a new tab)
Introduced
A resolution recognizing that facilities that produce renewable electricity are the cheapest power-generating facilities to operate and reliance on fossil fuel-generating facilities to meet growing power demand drives up wholesale electricity prices.
Sponsor Sheldon Whitehouse (D). Original cosponsor. 8 cosponsors. S.Res. 565 on Congress.gov(opens in a new tab)
Introduced
A resolution recognizing the ability of solar, storage, and wind to quickly and cheaply meet United States power demand growth.
Sponsor Sheldon Whitehouse (D). Original cosponsor. 10 cosponsors. S.Res. 564 on Congress.gov(opens in a new tab)
Introduced
A resolution affirming that the Federal Government should support school district investment in clean school buses.
Sponsor Sheldon Whitehouse (D). Original cosponsor. 8 cosponsors. S.Res. 563 on Congress.gov(opens in a new tab)
Introduced
A resolution recognizing that ozone pollution can cause lung disease, asthma attacks, cardiovascular problems, and reproductive issues.
Sponsor Sheldon Whitehouse (D). Original cosponsor. 8 cosponsors. S.Res. 562 on Congress.gov(opens in a new tab)
Introduced
A resolution recognizing that particulate matter pollution can cause heart attacks, asthma, strokes, and premature death.
Sponsor Sheldon Whitehouse (D). Original cosponsor. 8 cosponsors. S.Res. 561 on Congress.gov(opens in a new tab)
Introduced
A resolution recognizing that mercury pollution can cause severe health problems, including permanent brain damage, kidney damage, and birth defects.
Sponsor Sheldon Whitehouse (D). Original cosponsor. 8 cosponsors. S.Res. 560 on Congress.gov(opens in a new tab)
Introduced
A resolution recognizing that climate change is making wildfires more frequent, more intense, and more destructive.
Sponsor Sheldon Whitehouse (D). Original cosponsor. 10 cosponsors. S.Res. 559 on Congress.gov(opens in a new tab)
Introduced
A resolution recognizing that climate change-driven extreme weather events are increasing at the same time that the government is dismantling weather monitoring and alert systems.
Sponsor Sheldon Whitehouse (D). Original cosponsor. 10 cosponsors. S.Res. 558 on Congress.gov(opens in a new tab)
Introduced