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The White House has reciprocal tariffs.

The U.S. Supreme Court has questions.

I'm David Brancaccio in Los Angeles. Supreme Court justices yesterday seemed skeptical of several Trump administration arguments that the president can use emergency powers to impose tariffs without getting approval from Congress.

Tariffs as taxes and how they would refund money if it comes to that were among key points during yesterday's oral arguments.

Marketplaces Nancy Marshall-Genzor reports.

The issue here is a law President Trump used to impose many of his tariffs.

The International Emergency Economic Powers Act of 1977, or AIPA.

Small businesses and states brought lawsuits challenging the tariffs.

They say AIPA doesn't even mention the word tariff.

Their lawyer, Neil Kattayel, told the court tariffs or taxes, and only Congress has the power to tax.

Aipa is a sanction statute. It's not a tax statute where Congress gave away the store.

But President Trump's solicitor general, D. John Sauer, argued,

We don't contend that what's being exercised here is the power to tax. It's the power to regulate foreign commerce.

These are regulatory tariffs.

The major questions doctrine came up repeatedly yesterday.

It says if Congress wants to give up some of its powers like the ability to tax,

it has to say so clearly.

Chief Justice John Roberts said President Trump may have violated the doctrine by using IEPA to justify tariffs.

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