The Justice Department asked a federal appeals court on Friday to bar the release of President Trump’s tax returns to the Manhattan district attorney’s office, arguing that local prosecutors should have to meet a very high legal bar before investigating a sitting president.

The brief, which is available on the Courthousenews.com website, also argues that it may be an unconstitutional violation of the separation of state and federal governments for state law enforcement to assert jurisdiction over a president.

The 36-page brief is in support of Trump’s ongoing legal efforts to halt DA Cyrus Vance Jr.’s request for the president’s tax records from an accounting firm.