The suit concerns brucellosis, a bacterial disease that infects cattle, swine, goats, sheep and dogs and can spread to humans.

The lawsuit is the latest escalation in a decades-long fight between state and federal officials over how to manage the park's growing bison population.

Governor Greg Gianforte and two state agencies have filed a lawsuit against the National Park Service and its bison management plan at Yellowstone National Park. Gianforte is issu

Montana state officials are suing National Park over its bison management plan. The case argues that park officials have intentionally cut Montana out of management plans or ignored the park’s science in an effort to boost park bison numbers and avoid vaccinating them against brucel-losis.