President Donald Trump announced a 10% import tax on goods from eight European nations in response to their opposition to American control of Greenland. The measure takes effect in February and raises concerns about the stability of U.S. partnerships in Europe.

An unexpected display of frustration by Rory McIlroy fueled a tense atmosphere at this weekend’s Ryder Cup, highlighting the fragile balance in U.S.-European relations. His heated exchange with rowdy spectators even prompted the intervention of State Troopers, symbolizing the intense rivalry this year.