A federal court fight over President Donald Trump’s authority to unilaterally impose sweeping tariffs on U.S. trading partners is expected to be appealed to the Supreme Court for review, legal experts told Fox News Digital, in a case that has already proved to be a pivotal test of executive branch authority.At issue in the case is Trump's ability to use a 1977 emergency law to unilaterally slap steep import duties on a long list of countries doing business with the U.S.In interviews with Fox News Digital, longtime trade lawyers and lawyers who argued on behalf of plaintiffs in court last week...

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