WASHINGTON (AP) — Key Supreme Court conservatives seemed skeptical Wednesday that President Donald Trump has the power to unilaterally impose far-reaching tariffs, potentially putting at risk a key part of his agenda in the biggest legal test yet of his unprecedented presidency.

The Republican administration is trying to defend the tariffs central to Trump's economic agenda after lower courts ruled the emergency law he invoked doesn’t give him near-limitless power to set and change duties on imports.

The Constitution says Congress has the power to levy tariffs. But the Trump administration argues that in emergency situations the president can regulate importation — and that includes tariffs.

Justice Amy Coney Barrett grilled the government on that point. “Has there ever been another ins

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