(CNN) — The Supreme Court appeared deeply concerned Wednesday with President Donald Trump’s reliance on a vague federal law to impose global tariffs, with several members of the court’s conservative wing picking apart the administration’s position in a case that could have sweeping implications for the economy and presidential power.

During more than 2 and a half hours of argument in one of the most important economic cases to reach the high court in years , Chief Justice John Roberts and several of his fellow conservatives pointedly questioned the administration on its contention that it has the power to levy the tariffs and that the duties are a form of “regulation” of imports rather than a tax ultimately paid by American consumers.

If it breaks with Trump on tariffs, it would be

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