The court laid out a four-factor balancing test that lower courts must weigh before determining if congressional subpoenas involving the president and his papers are valid. Decided July 9, 2020 (argued May 12, 2020). Opinion of the Court: John Roberts → go there Dissenting: Thomas, Alito. Topic: Domestic. Trump v. Mazars USA, LLP, 591 U.S. ___ (2020) was a landmark US Supreme Court case involving subpoenas issued by committees of the US House of Representatives to obtain the tax returns of President Donald Trump, who had litigated against his personal accounting firm to prevent this disclosure, although the committees had been cleared by the United States Court of Appeals for the District of Columbia Circuit. Mazars was consolidated with Trump v. Deutsche Bank AG. Wiki link