Good Tuesday morning and welcome to Squawk on the Street. I'm Sarah Eisen.

Joining today from the World Economic Forum in Davos, Switzerland, along with David Faber.

As always, Mike Santoli, today live from the New York Stock Exchange.

We're following a number of breaking stories this hour, including an early sell-off tied

to President Trump's tariff threats

around Greenland. That's what everybody's talking about here. And the key tariff decision in the

Supreme Court that could come this hour will bring you the headlines as soon as we get them.

Plus, we've got a great lineup for you of guests from Davos, Switzerland, including

Citigroup CEO Jane Frazier, Salesforce CEO, Mark Beniof,

Micron CEO, Sanjay Marotra. For now, David, back over to you. Okay, yeah, Sarah,

we're going to start with tariffs, of course, that threat of a new round of levies because of Greenland,

essentially, the fact that the president wants the U.s to own it so to speak we await a potential

game changing tariff decision as well from the supreme court and amon javvers has all of it

for us from washington amen yeah david a lot at stake here just in the next couple of minutes it's

10 a.m on the east coast which means that we are in Supreme Court decision time.

We're going to watch for the Supreme Court.

We don't know exactly how many decisions, whether we're going to get the tariff decision.

That is a possibility over the next couple of moments.

So we're watching for that in real time.

Meanwhile, we saw the social media post from the president over the weekend that roiled markets that led to the open that we're seeing now.

Take a look at what the president posted on social media in part.

This is a response by the president to European countries which put forces in Greenland over the weekend

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