From the opinion pages of the Wall Street Journal, this is Potomac Watch.

As the Supreme Court prepares to hear a challenge to President Trump's emergency tariffs,

what do the law and the history say about how the justices are likely to come down?

And what about the White House's warnings that if it loses, the result will be financial ruin?

Welcome, I'm Kyle Peterson with the Wall Street Journal.

We're joined today by my colleagues on the editorial page,

columnist Alicia Finley, and Kim Strassel.

It's Election Day in America, or at least those parts of the

country that have odd-year races on the ballot, notably New York City, New Jersey, and Virginia.

But as we wait for the verdict of the voters to discuss tomorrow, let's take up the very significant

argument that will be at the Supreme Court on Wednesday, a pair of cases challenging

President Trump's tariffs under a law called IEPA, the International Emergency Economic Powers Act

of 1977. Let's start with President Trump on Air Force One on Sunday, laying out the stakes of this case from his point of view.

I think it's the most important decision, one of the most important decisions in the history

of our country, because without tariffs, without our being able to use tariffs really openly

and in every way, we are, we suffer tremendously from the national

security standpoint.

The national security of our countries have taken the biggest, I think it's one of the biggest

decisions in the history of the Supreme Court.

Other countries use tariffs against us, if we weren't able to openly and freely use tariffs against them.

I'll give you an example, China.

That was going to be a disaster for the world.

...