The U.S. Supreme Court, handing President Donald Trump an early victory in his quest to keep his financial records secret, on Monday blocked enforcement of a U.S. House committee subpoena that two lower courts had said was lawfully issued to the president’s accounting firm Mazars USA.

The ruling marked the first time the high court squarely addressed Trump’s financial records, and the order provides an early indication of how the justices could view the major separation-of-powers issue at the center of the dispute and others that are are certain to reach the court soon.