A federal judge on Monday rejected a Russian firm’s bid to escape charges brought by the special counsel, denying a challenge to the appointment of Robert Mueller III to lead the investigation into Moscow’s meddling in the 2016 presidential election.

In a 41-page opinion, Judge Dabney Friedrich, a Trump administration nominee to the U.S. District Court for the District of Columbia, struck down each of the arguments Concord Management and Consulting raised to contest Mueller’s authority.