President Trump’s insistence that the U.S. acquire Greenland could become a major international crisis.

He's now threatened tariffs on eight NATO allies who have expressed their opposition to the idea, and that is shaking up the World Economic Forum in Davos, Switzerland this week. 

And more tariffs would increase costs for American businesses at a time when American voters are talking about affordability at home.

Willem Marx reports from Davos, and NPR’s Scott Horsley and Mara Liasson recap the economic and political fallout.

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This episode was produced by Marc Rivers and Karen Zamora, with audio engineering by Ted Mebane and Hannah Gluvna. It was edited by Kelsey Snell, Rafael Nam, Nick Spicer and Patrick Jarenwattananon. Our executive producer is Sami Yenigun.

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