The Court of International Trade has ruled that President Trump wrongly used emergency powers to impose the tariffs he announced on Liberation Day, May 2.
How big a setback is it for Trump? A column in FT indicates several ways open to Trump:
The so-called section 232 tariffs on cars and steel are unaffected by the ruling. Trump will appeal this decision to the federal circuit court; beyond that he has a pliant Supreme Court waiting for him if need be; there are other obscure pieces of decades-old legislation he can dust off to resume his tariff campaign.
The American Congress has the legal powers to restrain the President of the United States. Over the years, Congress has progressively ceded these powers so that the President has a free run in most matters. Only Congress has the right to declare war. But American presidents have, for decades, initiated steps that led up to war without Congressional approval. There are numerous articles on the subject. Here is one:
President Ronald Reagan invaded Grenada. President George H.W. Bush invaded Panama and Somalia. President Bill Clinton used military force in Iraq, Haiti, Bosnia, Afghanistan, Sudan and Kosovo all without congressional approval. (President George W. Bush didn’t declare war on Afghanistan or Iraq, but Congress authorized the use of military force for those engagements). President Barack Obama ordered targeted military strikes in Libya in 2011 and dozens of unmanned drone strikes in Pakistan without congressional approval.
The courts have not stepped in either in these matters. So it's a bit of a stretch to think the courts will attempt to interfere in matters of economic policy, such as President Trump's position on tariffs.
The difficulty for the Trump administration is that clearing the hurdles posed by the judiciary in this matter will prolong uncertainty and create turbulence in the markets. The challenge is not pushing through tariffs per se as ensuring that the markets do not spin out of control in the interim.