By John Kruzel

WASHINGTON (Reuters) -After the U.S. Supreme Court used a conservative legal principle called the “major questions” doctrine to blow holes in Democratic former President Joe Biden’s agenda, will Republican President Donald Trump’s sweeping tariffs suffer the same fate?

That is a key question as the court decides the legality of tariffs that are central to Trump’s economic policy and how he deals with the rest of the world. The court heard arguments in the case on Wednesday, and the major questions doctrine was a focal point as the justices questioned the lawyers representing the Trump administration and the parties who have challenged the tariffs as an overreach of presidential power.

The court has a 6-3 conservative majority. Its conservative justices in recent years hav

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