A company linked to a major Trump donor received authorization from the Treasury Department to complete an acquisition involving a sanctioned Russian bank, according to public records.

The Texas-based Dynamic Frontier Holdings purchased Teghut, one of Armenia’s largest copper mines, this summer. Dynamic Frontier’s manager is Konstantin Sokolov, a Russian-American businessman who was one of three dozen private donors to President Donald Trump’s $350 million White House ballroom project.

Russia’s state-owned VTB Bank was Teghut’s primary shareholder and creditor prior to the purchase. The U.S. Treasury Department sanctioned VTB Bank following Russia’s invasion of Ukraine, describing it as a “critical artery” of the country’s financial system.