Welcome to Meet the Press Now. I'm Kelly O'Donnell in Washington, and of course, that was the closing bell on Wall Street.

We were watching how the market would react today

as the U.S. began a blockade on Iranian ports. After those peace negotiations between the U.S.

and Iran broke down this weekend, without a deal to end the war, markets rallying to close

higher by about a half a percent, while oil prices continue to hover around

$100 a barrel, as the safety and status of the Strait of Hormuz remains a question right now.

After President Trump ordered a naval blockade on all maritime traffic to and from Iran's

shores. The Pentagon noting, however, it will not block

other ships from going through the strait. Iran's armed forces calling the restrictions

illegal and amounting to piracy. Now, in a social media post today, President Trump also warning

any Iranian ship that comes close to the U.S. blockade will be, quote,

immediately eliminated. The president speaking to reporters outside the Oval Office today about this move.

We can't let a country blackmail or extort the world because that's what they're doing.

They're really blackmailing the world.

We're not going to let that happen.

Other countries are going to also.

Which countries, sir?

We don't need other countries, frankly, but they've offered the services.

We'll let it be known probably tomorrow.

So no answer there yet, but the president today also discussing the status of the talks with Iran

following Vice President Vance's 21-hour closed-door negotiations in Islamabad Saturday.

The White House saying the talks ended because Tehran would not give up its nuclear ambitions.

...