"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 Farrand BennetNFL players stand in tunnel during anthem, extending protests When it comes to drone tech, wildfire officials need the rights tools for the job NFL player wears 'Immigrants made America great' hat mocking Trump MORE (D-Colo.), Kent Conrad (D-N.D.), John HoevenJohn Henry HoevenOvernight Energy: Trump Cabinet officials head west | Zinke says California fires are not 'a debate about climate change' | Perry tours North Dakota coal mine | EPA chief meets industry leaders in Iowa to discuss ethanol mandate 74 protesters charged at Capitol in protest of Kavanaugh Big Oil’s carbon capture tax credit betrayal MORE (R-N.D.), Mike JohannsMichael (Mike) Owen JohannsMeet the Democratic sleeper candidate gunning for Senate in Nebraska Farmers, tax incentives can ease the pain of a smaller farm bill Lobbying World MORE (R-Neb.), Jerry MoranGerald (Jerry) MoranTougher Russia sanctions face skepticism from Senate Republicans Farm groups fear Trump aid won’t fix trade damage GOP senator: Trump said he never heard of anyone who didn’t want a payment from the government MORE (R-Kan.), John ThuneJohn Randolph ThuneSenate gets to work in August — but many don’t show up GOP leader criticizes Republican senators for not showing up to work Ex-Trump adviser: Shutdown 'not worst idea in the world' MORE (R-S.D.), Mark UdallMark Emery UdallRecord number of LGBT candidates running for governor Senate GOP rejects Trump’s call to go big on gun legislation Democratic primary could upend bid for Colorado seat MORE (D-Colo.), Tom UdallThomas (Tom) Stewart UdallCourt orders Trump EPA to ban controversial pesticide Top Dems: Trump tweet telling Sessions to end Mueller probe was obstruction of justice Dem senators introduce resolution calling on Trump to stop attacking the press MORE (D-N.M.), and Sheldon WhitehouseSheldon WhitehouseDems to challenge Kavanaugh for White House records Overnight Defense: Officials make show of force on election security | Dems want probe into Air Force One tours | Pentagon believes Korean War remains 'consistent' with Americans Dems call for investigation of Trump Air Force One tours MORE (D-R.I.). The National Bison Association, Intertribal Bison Council and Wildlife Conservation Society also support the measure.