While it seems that some agreement has been reached to placate Donald Trump’s obsession with taking over Greenland, details are still being revealed. So the possibility that the nascent trade war over the issue that was heating up before the announcement of an agreement could restart.

If it does, leaders in European capitals have looked at what levers are available to pull to try and dissuade the U.S. president from moving toward more aggressive action. Some of the most significant U.S. exports are its tech apps, services, and........

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