The return of Donald Trump to the White House marks a significant shift in global politics, with far-reaching consequences for international security, diplomacy, and economic alliances. As the United States redefines its foreign policy priorities, NATO, the European Union, and other global powers must reassess their strategic positions. Key issues such as U.S.-China relations, the future of NATO, energy security, and military cooperation will play a crucial role in shaping the new geopolitical order. With potential policy changes on trade, defense spending, and alliances, the global balance of power is poised for transformation.