President Donald Trump has leveraged tariffs as a primary instrument of his foreign policy, seeking to pressure nations into compliance with his agenda.

This unconventional tactic has seen him utilize tariffs not only for economic reasons but also as a means of securing political objectives, compelling ceasefires, and demanding cooperation from allies and adversaries alike.

This week, the Supreme Court is set to deliberate on whether Trump's implementation of tariffs exceeds his authority under the law. A negative ruling could significantly curtail the immediate power that tariffs afford him in international dealings.

Trump has referred to the court’s decision as potentially disastrous for U.S. interests, expressing deep anxiety and indicating he may attend the oral arguments in-person, calling it one of the most crucial cases in U.S. history.

The Justice Department backs Trump's position, arguing that his use of tariffs falls within the expansive powers granted to him over foreign affairs. However, previous rulings underline a contrasting interpretation that limits presidential authority in this context.

Modern presidents have typically relied on sanctions over direct tariffs for diplomatic strategies, but Trump’s approach has been to utilize them like a 'sledgehammer,' unlike his predecessors who treated them as a 'scalpel' in more measured applications.

Should the Supreme Court restrict his tariff authority, it may reshape how future presidents approach international trade, with tangible effects on both geopolitics and consumer prices in the U.S.

As discussions surrounding trade and tariffs continue, experts stress that a ruling in favor of Trump could embolden similar practices, redefining the contours of executive power.