US President Donald Trump asked the Supreme Court on Thursday to block a subpoena requesting access to his financial documents. The subpoena was issued by the House of Representatives to Trump’s personal accounting firm, Mazars USA. The Supreme Court justices have put a temporary hold on the subpoena as they determine their next step in the procedure.

The US Court of Appeals for the District of Columbia Circuit ruled in October that it was constitutional for the House to request documents related to Trump’s financial background, stating, “The fact that the subpoena in this case seeks information that concerns the President of the United States adds a twist, but not a surprising one: disputes between Congress and the President are a recurring plot in our national story. And that is precisely what the Framers intended.”

Trump’s argument lies on the constitutional question of how much power Congress should have over the Executive branch in regard to document requests and law enforcement. Trump’s petition stated, “Congress cannot exercise any of the powers of law enforcement; those powers are assigned under our Constitution to the Executive and the Judiciary.”