Concord Management, a Russian company that has been accused by special counsel Robert Mueller of illegally interfering in the 2016 presidential election, filed a motion this week to dismiss the entire case against it on the grounds that Mueller's appointment is allegedly unconstitutional.

Via BuzzFeed News reporter Zoe Tillman, Concord argued in its filing that Mueller's appointment violates the Constitution's appointments clause, and that "the regulations governing the special counsel... are unlawful and violate core separation-of-powers principles."

The firm, which is controlled by Putin ally Yevgeniy Prigozhin, has been accused by Mueller's office of breaking U.S. laws in order to help Donald Trump get elected president in 2016.

Tillman notes that Manafort tried unsuccessfully to argue that Mueller's appointment as special counsel violated the United States Constitution, although she says that Manafort's attorneys had tried to argue that the Mueller probe was unconstitutional because the special counsel had been granted too much discretionary power.

US District Judge Amy Berman Jackson rejected Manafort's argument and argued that he was "an obvious person of interest" in the Russia probe given "the combination of his prominence within the campaign and his ties to Ukrainian officials supported by and operating out of Russia, as well as to Russian oligarchs."