An effort to designate the American bison the National Mammal of the United States has drawn bipartisan support, led by a Missouri Democrat and a Nebraska Republican. It currently has the support of four congressmen and 17 senators. (Associated Press)

An effort to designate the American bison the National Mammal of the United States has drawn bipartisan support, led by a Missouri Democrat and a Nebraska Republican. It currently has the support of four congressmen and 17 senators. (Associated Press)