I'm Margaret Brennan in Washington, and this week on Face the Nation, in a major blow to the president's economic agenda, the Supreme Court strikes down his use of an emergency law to impose tariffs on foreign goods.

Despite the defeat, the president digs in, announcing a new 15% global tariff to replace the measures struck down by the court

and lashed out at the justices who struck it down.

I'm ashamed of certain members of the court. Absolutely ashamed for not having the courage

to do what's right for our country. They're very unpatriatic and disloyal to our Constitution.

I think it's an embarrassment to their families.

We'll get the latest from U.S. Trade Representative Ambassador Jameson Greer.

And what's the impact on the global economy?

We'll ask the President of the European Central Bank, Christine Lagarde.

Meanwhile, tensions remain high in the Middle East with a fresh

tied protest in Iran as the U.S. continues its military buildup in the region, putting pressure

on Tehran to agree on a nuclear deal. We'll get the latest from Iranian foreign minister,

Abbas Arragi.

And finally, a conversation with a bipartisan group of governors on how the president's

trade and immigration policies are affecting their state's economies and more.

It's all just ahead on Face the Nation.

Good morning and welcome to Face the Nation.

We have a lot of news to get to today. And we will begin with our interview with U.S. Trade Representative Ambassador Jameson Greer. We spoke with him earlier this morning.

So the president has imposed these tariffs using several different statutes, but the Supreme Court declared that invoking tariffs under the International

Emergency Economic Powers Act was illegal because taxation is the authority of the Congress.

But the President then said he is going to issue, quote, legally permissible tariffs and that

he doesn't need to go to Congress. So can you clarify, will you ask Congress to

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