Earlier in the day, a three-judge panel from the U.S. Court of International Trade found that Trump had overstepped his authority when imposing tariffs on imports from U.S. trading partners.
Two of the judges deciding the case were Republican appointees, including one Trump had seated on the bench, reports CBS News.
The Court of Appeals for the Federal Circuit quickly granted an emergency motion to stay the ruling, after the administration argued that stopping the decision was "critical for the country's national security."
In addition to attacking Leo, Trump also slammed the Federalist Society and the three judges who ruled against his tariffs.