Donald Trump likes to call himself “Tariff Man” and even “king”. But on 20 February, the US Supreme Court ruled that his use of particular emergency powers to “unilaterally impose tariffs of unlimited amount, duration and scope” on all and sundry was illegal.
That setback throws much of Trump’s trade strategy into chaos, deprives him of his favourite form of geopolitical leverage and constrains his freedom of action going forward. He is not, after all, an absolute monarch when it comes to commerce.
The justices’ ruling also casts doubt on the many trade agreements that are premised on Trump’s unilateral tariffs – not least his one-sided deal with the EU that was struck at his Turnberry golf course in Scotland last August.
But while the Supreme Court’s willingness to stand up to Trump is good news – not least for Americans worried about their country’s accelerated slide into authoritarianism – it does not prevent Trump achieving his protectionist aims by other means. Indeed, if it prompts Trump to lash out and other countries to retaliate, it might even end up making matters worse.
Read my article for Brussels Times.