[5] Christensen's nomination was reported from the United States Senate Committee on the Judiciary on October 6, 2011.

Fish and Wildlife Service lifted federal protections for grizzlies in Yellowstone National Park areas in 2017.

[6] On September 24, 2018, Christensen released a 48-page ruling restoring the protections and cancelling the hunts altogether, citing that Fish & Wildlife's analysis of the threats to grizzly bears was lacking and that they "failed to make a reasoned decision" in considering the impact of delisting the Yellowstone grizzlies from protected species status.

Christensen upheld Bullock's ability to issue his directive, saying "the Court has no trouble concluding the COVID19 pandemic constitutes a disaster and emergency".

[9] He further cited that the plaintiffs had not provided any evidence that voting by mail would lead to electoral fraud,[8] and noted that plaintiffs were forced to admit that there had not been a single documented case of voter fraud in Montana in the previous twenty years.