Gov. Greg Gianforte and two state agencies are suing the federal government. They argue Yellowstone National Park’s new bison management plan violates federal law.

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

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.

Montana alleged the Yellowstone National Park bison herd population has grown to a potential harmful level.

Montana officials, saying they've not been given "a fair shake," filed a New Year's Eve lawsuit over Yellowstone National Park's bison management plan.

A long-simmering battle between Yellowstone National Park officials and the Gianforte administration in Montana came to a head on Tuesday with state officials suing the park in federal court for its bison management plan.

Montana is suing Yellowstone National Park over a plan to increase the number of bison in and around the park and establish greater tolerance for their presence outside its boundaries.

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.