New Delhi, Sept. 8 -- President Donald Trump is preparing to take his fight for unilateral tariff authority to the US Supreme Court after suffering defeats in lower courts. His legal team is asking the justices to overturn a ruling that blocked his use of a 1970s national security law to impose duties on foreign goods.

On Wednesday, Trump petitioned the Supreme Court to quickly review a US Court of Appeals for the Federal Circuit ruling that the International Emergency Economic Powers Act (IEEPA) does not grant presidents the power to set tariffs.

In a 7-4 decision, the court said the statute provides significant emergency powers but "none of these explicitly include the power to impose tariffs, duties, or the power to tax."

Even as th...