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Sen. Mazie Hirono (D-HI)

Tenure: 113th–119th Congresses (House service: 110th–112th Congresses)
Years of Service: 2013–Present

Notable Actions
119th Congress

✅ Cosponsor of the Better CARE for Animals Act, S. 1538, to strengthen enforcement of the Animal Welfare Act by expanding federal authority to investigate and prosecute animal cruelty violations and improve coordination between the U.S. Department of Agriculture and the Department of Justice.

✅ Voted “Nay” on S.J. Res. 23 (Senate Roll Call Vote 122), a Congressional Review Act resolution to overturn federal regulations strengthening implementation of the Endangered Species Act, including protections governing the listing of imperiled species and designation of critical habitat. A “Nay” vote is the pro-animal position because it supported retaining stronger federal protections for threatened and endangered wildlife and their habitat.

❌ Voted “Nay” on the motion to proceed to S.J. Res. 69 (Senate Roll Call Vote 597), a joint resolution under the Congressional Review Act to bring the measure before the Senate for consideration to overturn the U.S. Fish and Wildlife Service’s Barred Owl Management Strategy, which authorized the large-scale killing of barred owls in Washington, Oregon, and California. A “Nay” vote is the anti-animal position because it opposed moving forward with a vote to repeal the barred owl kill plan.

118th Congress

✅ Cosponsor of the Fighting Inhumane Gambling and High-Risk Trafficking (FIGHT) Act, S. 1529, to strengthen federal enforcement against animal fighting and related criminal activity.

✅ Lead cosponsor of the Prevent All Soring Tactics (PAST) Act, S. 4004, to end the failed system of industry self-policing under the Horse Protection Act by banning devices associated with horse soring, increasing penalties for violators, and strengthening USDA enforcement to protect Tennessee Walking Horses and related breeds from intentional abuse used to exaggerate their gait in competitions.

✅ Cosponsor of the Better CARE for Animals Act, S. 2555, to strengthen enforcement of the Animal Welfare Act by expanding federal authority to investigate and prosecute animal cruelty violations and improve coordination between the U.S. Department of Agriculture and the Department of Justice.

117th Congress

✅ Cosponsor of the Captive Primate Safety Act, S. 1588, to prohibit the private ownership, breeding, sale, transport, and other commercial activities involving nonhuman primates by amending the Lacey Act, while exempting accredited zoos, sanctuaries, research facilities, and certain other qualified entities. The legislation is designed to protect both public safety and the welfare of highly intelligent primates by ending the commercial pet trade in these animals.

✅ Cosponsor of the Puppy Protection Act, S. 1385, bipartisan legislation to strengthen federal standards of care for dogs kept by commercial breeders by improving requirements for housing, veterinary care, exercise, socialization, and humane breeding practices.

✅ Cosponsor of the Big Cat Public Safety Act, S. 1210, to reduce the number of tigers, lions and other big cats living in substandard conditions and to protect public safety by banning public contact activities with these animals and prohibiting their possession by individuals and entities lacking a USDA license. H.R. 263 – Big Cat Public Safety Act.

✅ Lead cosponsor of the Prevent All Soring Tactics (PAST) Act, S. 2295, to crack down on the cruel practice of soring, in which trainers inflict severe pain on the hooves and legs of Tennessee walking horses and related breeds to force them to perform an unnaturally high-stepping gait for competitions.

✅ Cosponsor of the Shark Fin Sales Elimination Act, S. 1106, to end the U.S. commercial trade in shark fins by prohibiting their sale, purchase, and transport, helping reduce the global demand that drives the cruel practice of shark finning. Core provisions of the bill were later incorporated into the James M. Inhofe National Defense Authorization Act for Fiscal Year 2023, which was signed into law in December 2022, making the United States one of the world’s largest nations to ban the domestic shark fin trade.

✅ Voted “Nay” on Sen. Ron Johnson’s Motion to Instruct conferees on H.R. 4521 (Senate Roll Call Vote 152), which sought to reject a House-passed provision prohibiting commercial mink farming in the United States. A “Nay” vote is the pro-animal position because it supported retaining the House provision to end commercial mink farming.

116th Congress

✅ Cosponsor of the Shark Fin Sales Elimination Act, S. 877, to end the U.S. commercial trade in shark fins by prohibiting their sale, purchase, and transport, helping reduce the global demand that drives the cruel practice of shark finning. Core provisions of the bill were later incorporated into the James M. Inhofe National Defense Authorization Act for Fiscal Year 2023, which was signed into law in December 2022, making the United States one of the world’s largest nations to ban the domestic shark fin trade.

✅ Cosponsor of the Prevent All Soring Tactics (PAST) Act, S. 1007, to crack down on the cruel practice of “soring,” in which trainers deliberately inflict severe pain on the hooves and legs of Tennessee walking horses and related breeds to force them to perform an unnaturally high- stepping gait for competitions.

✅ Cosponsor of the Big Cat Public Safety Act, S. 2561, to reduce the number of tigers, lions and other big cats living in substandard conditions and protect public safety by banning public contact activities with these animals and prohibiting their possession by individuals and entities lacking a U.S. Department of Agriculture license.

✅ Approved by unanimous consent the Preventing Animal Cruelty and Torture (PACT) Act, landmark legislation making the most egregious acts of intentional animal cruelty—including crushing, burning, drowning, suffocating, impaling, and other forms of torture—a federal felony when committed in interstate commerce, on federal property, or within federal jurisdiction. The measure strengthened the nation’s legal framework against animal cruelty and closed a longstanding gap in federal law by ensuring that the worst acts of animal abuse could be prosecuted even when state or local authorities could not act. The Senate passed the bill by unanimous consent.

115th Congress

✅ Cosponsor of the Prevent All Soring Tactics (PAST) Act, S. 2957, to crack down on the cruel practice of “soring,” in which trainers deliberately inflict pain on the hooves and legs of Tennessee walking horses and related breeds to force them to perform an unnaturally high-stepping gait for competitions.

✅ Cosponsor of the Safeguard American Food Exports (SAFE) Act, S. 1706, to protect horses and consumers by prohibiting the transport and export of U.S. horses to slaughter for human consumption. American horses are not raised for food and are routinely given drugs that can be toxic to people if ingested. Horse slaughter is cruel, and the U.S. public overwhelmingly opposes it.

✅ Approved by unanimous consent the Preventing Animal Cruelty and Torture (PACT) Act, S. 654, bipartisan legislation to make the most egregious acts of intentional animal cruelty—including crushing, burning, drowning, suffocating, impaling, and other forms of torture—a federal felony when committed in interstate or foreign commerce or within federal jurisdiction. The Senate passed the legislation by unanimous consent in December 2017.

✅ Voted “Nay” on H.J. Res. 69, a Congressional Review Act (Senate Roll Call Vote 92) resolution to overturn an Obama administration rule prohibiting killing bear cubs and wolf pups in their dens, baiting bears with food to shoot them at close range, and aerial shooting of wolves and other predators. The resolution passed the Senate 52–47. A “Nay” vote is the pro-animal position because it sought to retain the rule forbidding these inhumane and unsporting predator-killing practices on national wildlife refuges in Alaska.

✅ Voted “Yea” on the conference report for the Agriculture Improvement Act of 2018 (Farm Bill), H.R. 2 (Senate Roll Call Vote 259), which included major animal-protection provisions prohibiting dog and cat meat consumption, extending the federal animal-fighting prohibition to all U.S. territories, and providing protections for domestic-violence survivors and their pets. The final bill also excluded the House-passed King Amendment, which threatened state animal-welfare laws. The Senate approved the Farm Bill 87–13.

114th Congress

✅ Cosponsor of the Preventing Animal Cruelty and Torture (PACT) Act, S. 1831, to make extreme acts of intentional animal cruelty a federal crime when committed in interstate or foreign commerce or within federal jurisdiction.

✅ Cosponsor of the Safeguard American Food Exports (SAFE) Act, S. 1214, to protect horses and consumers by prohibiting the transport and export of U.S. horses to slaughter for human consumption. American horses are not raised for food and are routinely given drugs that can be toxic to people if ingested. Horse slaughter is cruel, and the U.S. public overwhelmingly opposes it.

✅ Cosponsor of the Prevent All Soring Tactics (PAST) Act, S. 1121, to crack down on the cruel practice of “soring,” in which trainers deliberately inflict pain on the hooves and legs of Tennessee walking horses and related breeds to force them to perform an unnaturally high-stepping gait for competitions.

113th Congress

✅ Cosponsor of the Animal Fighting Spectator Prohibition Act, S. 666, bipartisan legislation to strengthen federal animal fighting laws by prohibiting knowingly attending or bringing a child to a dogfight, cockfight, or other illegal animal fighting venture, increasing penalties for those who support these cruel criminal enterprises.

✅ Cosponsor of the Safeguard American Food Exports (SAFE) Act, S. 541, to protect horses and consumers by prohibiting the transport and export of U.S. horses to slaughter for human consumption. American horses are not raised for food and are routinely given drugs that can be toxic to people if ingested. Horse slaughter is cruel, and the U.S. public overwhelmingly opposes it.

✅ Cosponsor of the Puppy Uniform Protection and Safety (PUPS) Act, S. 395, to strengthen federal oversight of large-scale commercial dog breeders, including online puppy sellers, and require humane standards for housing and daily exercise.

✅ Cosponsor of the Captive Primate Safety Act, S. 1463, bipartisan legislation to prohibit the interstate trade of monkeys, apes, and other nonhuman primates for the exotic pet trade, protecting these highly intelligent animals from exploitation while reducing public health and safety risks associated with private ownership.

✅ Cosponsor of the Prevent All Soring Tactics (PAST) Act, S. 1406, to crack down on the cruel practice of “soring,” in which trainers deliberately inflict pain on the hooves and legs of Tennessee walking horses and related breeds to force them to perform an unnaturally high-stepping gait for competitions.

111th Congress

✅ Approved by unanimous consent the Animal Crush Video Prohibition Act, H.R. 5566, to prohibit the creation and interstate distribution of obscene animal-crush videos depicting intentional acts of extreme animal cruelty. The legislation was enacted as Public Law 111-294. The Senate initially passed H.R. 5566 with an amendment by unanimous consent and later agreed to the House amendment by unanimous consent.