President Trump has been denied in his attempt to block New York City prosecutor Cyrus Vance Jr.’s attempt to access his tax returns by a federal appeals court.

This loss sets up a potential Supreme Court fight over the matter.

According to CNBC:

A federal appeals court on Wednesday rejected President Donald Trump’s effort to block enforcement of a grand jury subpoena demanding his income tax returns from his accountants.

But the Court of Appeals for the 2nd Circuit suspended enforcement of that subpoena by Manhattan District Attorney Cyrus Vance Jr., giving Trump time to ask the Supreme Court, for the second time, to step into the case and block it permanently.

This is the second time that appeals court has rejected Trump’s request to deny Vance access to his tax returns by upholding a lower federal court ruling.

Trump lost an earlier appeal of a similar ruling when he took the case to the Supreme Court, which this summer said that he did not have a right to prevent his accounting firm Mazars USA from complying with the subpoena just because he is president.

It is unclear when the case could be heard, but it is possible that it will be one of the first cases heard by Amy Coney Barrett should she be confirmed.