U.S. Senator

Markwayne Mullin 2025-2026 Regular Session - Authored & Sponsored Legislation

Legislative Session

Co-Sponsor of Legislation

US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB9

Protection of Women and Girls in Sports Act of 2025This 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.
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB5

Introduced
1/6/25  
Engrossed
1/21/25  
Enrolled
1/23/25  
Passed
1/29/25  
Chaptered
1/29/25  
Laken Riley Act
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB339

Introduced
1/30/25  
Nancy Gardner Sewell Medicare Multi-Cancer Early Detection Screening Coverage Act
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB65

Introduced
1/9/25  
Constitutional Concealed Carry Reciprocity Act of 2025
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SJR12

Introduced
2/4/25  
This joint resolution nullifies the Environmental Protection Agency (EPA) rule titled Waste Emissions Charge for Petroleum and Natural Gas Systems: Procedures for Facilitating Compliance, Including Netting and Exemptions and published on November 18, 2024. The rule outlines compliance requirements under the Methane Emissions Reduction Program. Under the program, the EPA collects an annual charge on emissions of methane and other greenhouse gases from entities in the oil and gas sector if their emissions exceed specified waste emissions thresholds.
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB401

Introduced
2/4/25  
Fair Access to Banking Act
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB364

Introduced
2/3/25  
Hearing Protection Act
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB587

Introduced
2/13/25  
Death Tax Repeal Act of 2025
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SCR8

Introduced
3/3/25  
A concurrent resolution supporting the Local Radio Freedom Act.
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB209

Introduced
1/23/25  
Protecting Minors from Medical Malpractice Act of 2025This bill makes a medical practitioner who performs a gender-transition procedure on an individual who is less than 18 years of age liable for any physical, psychological, emotional, or physiological harms from the procedure for 30 years after the individual turns 18.Additionally, if a state requires medical practitioners to perform gender-transition procedures, that state shall be ineligible for federal funding from the Department of Health and Human Services.Under the bill, gender-transition procedures generally include certain surgeries or hormone therapies that change the body of an individual to correspond to a sex that is discordant with the individual's biological sex. They exclude, however, interventions to treat (1) individuals who either have ambiguous external biological sex characteristics or lack a normal sex chromosome structure, sex steroid hormone production, or sex steroid hormone action; (2) infections, injuries, diseases, or disorders caused by a gender-transition procedure; or (3) a physical disorder, injury, or illness that places an individual in imminent danger of death or impairment of a major bodily function.
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB203

Introduced
1/23/25  
Defund Planned Parenthood ActThis bill prohibits providing federal funding to Planned Parenthood Federation of America or its affiliates.
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB224

Introduced
1/23/25  
Promoting Domestic Energy Production Act
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB214

Introduced
1/23/25  
MEDAL Act of 2025 Monetary Enhancement for Distinguished Active Legends Act of 2025
US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB171

Introduced
1/21/25  
A bill to remove the lesser prairie-chicken from the lists of threatened species and endangered species published pursuant to the Endangered Species Act of 1973, to amend that Act to exclude the lesser prairie-chicken from the authority of that Act, and for other purposes.

Primary Sponsor of Legislation

US

US Federal 2025-2026 Regular Session

US Federal Senate Bill SB2027

Introduced
6/11/25  
Prescription Information Modernization Act of 2025