President Biden just finished a three-country trip, where he met with world leaders in the United Kingdom, Belgium, and in Switzerland. The main focus of the trip was to reinvigorate U.S. alliances in Europe and with NATO. To discuss the trip, Aaron spoke this week with Rachel Ellehuus, the deputy director and a senior fellow with the Europe, Russia, and Eurasia Program at the Center for Strategic and International Studies (CSIS).

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