
U.S. Senator for South Dakota
Republican
Senate term end not loaded yet
Missed 0.1% 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.
Republican. In Congress since 1997, 7 terms in total.
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Bills and resolutions Thune 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.
A resolution expressing gratitude to the Joint Congressional Committee on Inaugural Ceremonies, the Architect of the Capitol, the Sergeant at Arms, the Secretary of the Senate, law enforcement officers, emergency personnel, and volunteers for their support in making the Presidential Inauguration a success.
Sponsor Mike Rounds (R). Original cosponsor. 44 cosponsors.
Passed the Senate
Nationwide Consumer and Fuel Retailer Choice Act of 2025
Sponsor Deb Fischer (R). Original cosponsor. 22 cosponsors. S. 593 on Congress.gov(opens in a new tab)
Introduced
Nationwide Consumer and Fuel Retailer Choice Act of 2025
This bill amends the Clean Air Act to address the limitations on Reid Vapor Pressure (a measure of gasoline's volatility) that are placed on gasoline during the summer ozone season. Specifically, the bill applies the waiver for Reid Vapor Pressure requirements that is applicable to gasoline blended with 10% ethanol (E10) to gasoline blended with up to 15% ethanol (E15). This change allows gasoline that is blended with 10% to 15% ethanol to be sold year-round.
Currently, states may be excluded from the waiver for Reid Vapor Pressure requirements by submitting documentation supporting that the waiver would increase air pollution. The bill nullifies existing state exclusions, but states may submit documentation after enactment of the bill to be excluded going forward.
The bill also modifies the Renewable Fuel Standard Program, which requires transportation fuel sold or introduced into commerce in the United States to contain minimum volumes of renewable fuel. Under the existing program, obligated parties, such as small refineries, must satisfy the volume obligations by either blending renewable fuels into their gasoline or diesel fuel products or by acquiring credits that represent the required renewable fuel volume. The bill directs the Environmental Protection Agency to return compliance credits to small refineries under certain circumstances.
ELITE Vehicles Act
Sponsor John Barrasso (R). Original cosponsor. 14 cosponsors. S. 541 on Congress.gov(opens in a new tab)
Introduced
Eliminate Lavish Incentives To Electric Vehicles Act or the ELITE Vehicles Act
This bill eliminates federal tax credits for the purchase of certain clean vehicles (generally electric vehicles and plug-in hybrid vehicles) and electric vehicle recharging stations.
Specifically, the bill repeals the federal tax credits for
• the purchase of a qualified used clean vehicle (tax credit of up to $4,000 for the purchase of a previously-owned clean vehicle before 2033),
• the purchase of a qualified new clean vehicle (tax credit of up to $7,500 for the purchase of a new clean vehicle before 2033),
• the purchase of a qualified commercial clean vehicle (business tax credit of up to $40,000 for the purchase of a commercial clean vehicle before 2033), and
• alternative fuel vehicle refueling property used to recharge electric vehicles (tax credit of up to $1,000 for individuals or up to $100,000 for businesses for the installation of property before 2033 that is used to recharge electric vehicles).
Protecting Access for Hunters and Anglers Act of 2025
Sponsor Steve Daines (R). Original cosponsor. 36 cosponsors. S. 537 on Congress.gov(opens in a new tab)
Introduced
Protecting Access for Hunters and Anglers Act of 2025
This bill bars the Fish and Wildlife Service (FWS), the Bureau of Land Management (BLM), and the Forest Service from prohibiting or regulating the use of lead ammunition or tackle on federal land or water. The bill makes exceptions for specified existing regulations and where the FWS, the BLM, or the Forest Service determines that a decline in wildlife population at the specific unit of federal land or water is primarily caused by the use of lead in ammunition or tackle, based on the field data from such unit, and the state approves the regulations.
A resolution honoring the memory of the victims of the tragic mid-air collision between American Airlines Flight 5342 and United States Army Aviation Brigade Priority Air Transport 25 on January 29, 2025.
Sponsor Jerry Moran (R). Original cosponsor. 31 cosponsors. S.Res. 64 on Congress.gov(opens in a new tab)
Passed the Senate
This resolution commemorates the 67 lives lost in the collision of American Eagle Flight 5342 and the U.S. Army helicopter flying under the call sign PAT 25 near Ronald Reagan Washington National Airport on January 29, 2025.
The resolution also expresses gratitude to the law enforcement and emergency medical personnel who responded to the collision.
Educational Choice for Children Act of 2025
Sponsor Bill Cassidy (R). Original cosponsor. 33 cosponsors. S. 292 on Congress.gov(opens in a new tab)
Introduced
Marcella LeBeau Recognition Act
Sponsor Mike Rounds (R). Original cosponsor. 1 cosponsor. S. 287 on Congress.gov(opens in a new tab)
Passed committee
Marcella LeBeau Recognition Act
This bill designates the federal building located at 225 South Pierre Street in Pierre, South Dakota, as the Marcella LeBeau Federal Building.
A joint resolution providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Federal Communications Commission relating to "Addressing the Homework Gap Through the E-Rate Program".
Sponsor Ted Cruz (R). Original cosponsor. 16 cosponsors. S.J.Res. 7 on Congress.gov(opens in a new tab)
Passed the Senate
This joint resolution nullifies the final rule issued by the Federal Communications Commission titled Addressing the Homework Gap Through the E-Rate Program and published on August 20, 2024. The rule permits schools and libraries participating in the Schools and Libraries Universal Service Support program (E-Rate) to purchase discounted Wi-Fi hotspots and associated mobile connectivity service for off-premises use by students, school staff, and library patrons. Under the rule, E-Rate participants must implement acceptable use policies that require hotspots to be used primarily for educational purposes.
A concurrent resolution expressing the sense of Congress that tax-exempt fraternal benefit societies have historically provided and continue to provide critical benefits to the people and communities of the United States.
Sponsor Mike Crapo (R). Original cosponsor. 31 cosponsors. S.Con.Res. 6 on Congress.gov(opens in a new tab)
Introduced
This concurrent resolution expresses the sense of Congress that tax-exempt fraternal benefit societies serve as a private economic and social support system, providing benefits to their members is necessary to support the charitable and fraternal activities of the volunteer chapters, and their work should continue to be promoted.
Main Street Tax Certainty Act
Sponsor Steve Daines (R). Original cosponsor. 45 cosponsors. S. 213 on Congress.gov(opens in a new tab)
Introduced
Main Street Tax Certainty Act
This bill makes permanent the qualified business income (QBI) tax deduction.
Under current law, individuals, estates, and trusts may deduct the lower of (1) 20% of QBI from a qualified business, qualified real estate investment trust dividends, and qualified publicly traded partnership income; or (2) 20% of taxable income less net capital gain. (Some limitations apply.)
However, under current law, the QBI tax deduction expires after December 31, 2025.
No Taxpayer Funding for Abortion and Abortion Insurance Full Disclosure Act of 2025
Sponsor Roger Wicker (R). Original cosponsor. 50 cosponsors. S. 186 on Congress.gov(opens in a new tab)
Introduced
No Taxpayer Funding for Abortion and Abortion Insurance Full Disclosure Act of 2025
This bill modifies provisions relating to federal funding for, and health insurance coverage of, abortions.
Specifically, the bill prohibits the use of federal funds for abortions or for health coverage that includes abortions. Such restrictions extend to the use of funds in the budget of the District of Columbia. Additionally, abortions may not be provided in a federal health care facility or by a federal employee.
Historically, language has been included in annual appropriations bills for the Department of Health and Human Services (HHS) that prohibits the use of federal funds for abortions—such language is commonly referred to as the Hyde Amendment. Similar language is also frequently included in appropriations bills for other federal agencies and the District of Columbia. The bill makes these restrictions permanent and extends the restrictions to all federal funds (rather than specific agencies).
The bill's restrictions regarding the use of federal funds do not apply in cases of rape, incest, or where a physical disorder, injury, or illness endangers a woman's life unless an abortion is performed. The Hyde Amendment provides the same exceptions.
The bill also prohibits qualified health plans from including coverage for abortions. Currently, qualified health plans may cover abortion, but the portion of the premium attributable to abortion coverage is not eligible for subsidies.
Protect Funding for Women's Health Care Act
Sponsor Joni Ernst (R). Original cosponsor. 19 cosponsors. S. 177 on Congress.gov(opens in a new tab)
Introduced
Protect Funding for Women's Health Care Act
This bill prohibits federal funding of Planned Parenthood Federation of America or its affiliates, subsidiaries, successors, or clinics.
Dismantle Iran’s Proxy Act of 2025
Sponsor James Risch (R). Joined Jan 21, 2025. 20 cosponsors. S. 145 on Congress.gov(opens in a new tab)
Introduced
Dismantle Iran’s Proxy Act of 2025
This bill requires the President to take actions against Ansarallah, the Iran-backed movement in Yemen also known as the Houthis.
Specifically, the bill requires the President to designate Ansarallah as a foreign terrorist organization. (Among other things, such a designation allows the Department of the Treasury to require U.S. financial institutions to block transactions involving the organization.)
The President must also (1) impose property blocking sanctions on Ansarallah and any foreign person who is an official, agent, or affiliate of the organization; (2) submit to Congress a determination as to whether three specified individuals are officials, agents, or affiliates of Ansarallah; and (3) submit to Congress a strategy to degrade the offensive capabilities of Ansarallah and to restore freedom of navigation in the Red Sea and nearby waterways.
Born-Alive Abortion Survivors Protection Act
Sponsor James Lankford (R). Original cosponsor. 50 cosponsors. S. 6 on Congress.gov(opens in a new tab)
Introduced
Born-Alive Abortion Survivors Protection Act
This bill establishes requirements for the degree of care a health care practitioner must provide in the case of a child born alive following an abortion or attempted abortion.
Specifically, a health care practitioner who is present must (1) exercise the same degree of care as would reasonably be provided to any other child born alive at the same gestational age, and (2) ensure the child is immediately admitted to a hospital. Additionally, a health care practitioner or other employee who has knowledge of a failure to comply with the degree-of-care requirements must immediately report such failure to law enforcement.
A health care practitioner who fails to provide the required degree of care, or a health care practitioner or other employee who fails to report such failure, is subject to criminal penalties—a fine, up to five years in prison, or both.
An individual who intentionally kills or attempts to kill a child born alive is subject to prosecution for murder.
The bill bars the criminal prosecution of a mother of a child born alive under this bill and allows her to bring a civil action against a health care practitioner or other employee for violations.
Wounded Knee Massacre Memorial and Sacred Site Act
Sponsor Mike Rounds (R). Original cosponsor. 1 cosponsor. S. 105 on Congress.gov(opens in a new tab)
Passed committee
Wounded Knee Massacre Memorial and Sacred Site Act
This bill directs the Department of the Interior to complete all actions necessary to place approximately 40 acres of land in Oglala Lakota County, South Dakota, into restricted fee status for the Oglala Sioux Tribe and the Cheyenne River Sioux Tribe. Restricted fee status refers to land that is owned by a tribe or tribal member but is subject to restrictions by the United States against alienation (i.e., sale or transfer) or encumbrance (e.g., liens, leases, or rights-of-way) by operation of law.
The bill requires the land to be held and maintained as a memorial and sacred site, as outlined by the document titled Covenant Between the Oglala Sioux Tribe and the Cheyenne River Sioux Tribe and dated October 21, 2022. Further, it prohibits commercial development and gaming activity on the land.
Protection of Women and Girls in Sports Act of 2025
Sponsor Tommy Tuberville (R). Joined Jan 13, 2025. 44 cosponsors. S. 9 on Congress.gov(opens in a new tab)
Introduced
Protection of Women and Girls in Sports Act of 2025
This bill generally prohibits school athletic programs from allowing individuals whose biological sex at birth was male to participate in programs that are for women or girls.
Specifically, the bill provides that it is a violation of Title IX of the Education Amendments of 1972 for federally funded education programs or activities to operate, sponsor, or facilitate athletic programs or activities that allow individuals of the male sex to participate in programs or activities that are designated for women or girls. (Title IX prohibits discrimination on the basis of sex in federally funded education programs or activities, including in public elementary and secondary schools and in colleges and universities.) Under the bill, sex is based on an individual's reproductive biology and genetics at birth.
A resolution honoring the life and legacy of President Jimmy Carter and commending President Jimmy Carter for his life-long career of public service, humanitarian leadership, diplomacy, and courageous advocacy.
Sponsor Raphael Warnock (D). Original cosponsor. 98 cosponsors. S.Res. 19 on Congress.gov(opens in a new tab)
Passed the Senate
This resolution (1) mourns the passing of former President Jimmy Carter and extends sympathy to his family; and (2) honors his life, legacy, and contributions to the United States.
Constitutional Concealed Carry Reciprocity Act of 2025
Sponsor John Cornyn (R). Original cosponsor. 49 cosponsors. S. 65 on Congress.gov(opens in a new tab)
Introduced
Constitutional Concealed Carry Reciprocity Act of 2025
This bill allows a qualified individual to carry a concealed handgun into or possess a concealed handgun in another state that allows its residents to carry concealed firearms.
A qualified individual must (1) be eligible to possess, transport, or receive a firearm under federal law; (2) carry a valid photo identification document; and (3) carry a valid state-issued concealed carry permit, or be eligible to carry a concealed firearm in his or her state of residence.
Laken Riley Act
Sponsor Katie Britt (R). Original cosponsor. 53 cosponsors. S. 5 on Congress.gov(opens in a new tab)
Became law
Laken Riley Act
This act requires the Department of Homeland Security (DHS) to detain certain non-U.S. nationals (aliens under federal law) who have been arrested for burglary, theft, larceny, shoplifting, assault of a law enforcement officer, or any crime that results in death or serious bodily injury to another person. The act also authorizes states to sue the federal government for decisions or alleged failures related to immigration enforcement.
Under this act, DHS must detain an individual who (1) is unlawfully present in the United States or did not possess the necessary documents when applying for admission; and (2) has been charged with, arrested for, convicted of, or admits to having committed acts that constitute the essential elements of the above crimes.
The act also authorizes state governments to sue for injunctive relief over certain immigration-related decisions or alleged failures by the federal government if the decision or failure caused the state or its residents harm, including financial harm of more than $100. Specifically, the state government may sue the federal government over a
• decision to release a non-U.S. national from custody;
• failure to fulfill requirements relating to inspecting individuals seeking admission into the United States, including requirements related to asylum interviews;
• failure to fulfill a requirement to stop issuing visas to nationals of a country that unreasonably denies or delays acceptance of nationals of that country;
• violation of limitations on immigration parole, such as the requirement that parole be granted only on a case-by-case basis; or
• failure to detain an individual who has been ordered removed from the United States.