"I ask my colleagues to help me support and pass this legislation honoring the bison and designating it as our national mammal," Enzi said. "The bison has and will continue to be a symbol of America, its people and a way of life."

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Three states have designated the bison as their state mammal and American bison freely roam national parks, such as Yellowstone and Grand Teton.

"The bison has been integrally linked to the economic and spiritual lives of many Native American tribes over the centuries," Enzi said. "Since our frontier days, the bison has become a symbol of American strength and determination."

The bipartisan bill is co-sponsored by Sens. Michael BennetMichael BennetDems step up attacks on GOP ObamaCare bill Trump welcomes Gorsuch on first Supreme Court visit Why higher education is in need of regulatory relief MORE (D-Colo.), Kent Conrad (D-N.D.), John HoevenJohn HoevenGOP considers keeping ObamaCare taxes Senators want governors involved in health talks Republicans go to battle over pre-existing conditions MORE (R-N.D.), Mike JohannsMike JohannsLobbying World To buy a Swiss company, ChemChina must pass through Washington Republican senator vows to block nominees over ObamaCare co-ops MORE (R-Neb.), Jerry MoranJerry MoranProposal to privatize air traffic control struggles to win over critics Senate panel to reject Trump’s air traffic control plan in aviation bill Senate panel readies must-pass aviation bill MORE (R-Kan.), John ThuneJohn ThuneSenate panel unveils aviation bill with consumer protections, drone fix Four Senate conservatives say they oppose ObamaCare repeal bill Live coverage: Senate GOP unveils its ObamaCare repeal bill MORE (R-S.D.), Mark UdallMark UdallDemocratic primary could upend bid for Colorado seat Picking 2018 candidates pits McConnell vs. GOP groups Gorsuch's critics, running out of arguments, falsely scream 'sexist' MORE (D-Colo.), Tom UdallTom UdallDems, greens press Trump administration on methane rewrites Overnight Regulation: House passes bill to roll back Dodd-Frank | Sage grouse back in the spotlight | GOP chair won't back Glass-Steagall revival Overnight Tech: FCC disputes reporter's account of 'manhandling' incident | Verizon to cut 2K jobs at Yahoo | Russians used spyware on Instagram | Virginia moves on 5G networks MORE (D-N.M.), and Sheldon WhitehouseSheldon WhitehouseJudiciary Committee to continue Russia probe after Mueller meeting GOP hits the gas on ObamaCare repeal Dems limited in their ability to slow ObamaCare vote MORE (D-R.I.). The National Bison Association, Intertribal Bison Council and Wildlife Conservation Society also support the measure.