The first 100 days of a U.S. presidency are perceived as a symbolic milestone and a barometer for forecasting the success of the four-year term. The second Trump administration’s first 100 days can be characterized by a focus on the economic front while cultivating favorable conditions for national security initiatives. The administration’s designation of April 2 as “Liberation Day” exemplifies its aggressive tariff agenda to achieve the MAGA (Make America Great Again) objectives. While aspects of security – such as involvement in peace negotiations and expansionist rhetoric – were present, economic priorities took precedence. Nonetheless, the administration has been setting the stage for a recalibration of its security policy to create favorable conditions on the security front. The 100-day record on foreign and security affairs shows three characteristics: (1) disregard for the rules-based order, (2) a comprehensive overhaul of alliance structures, (3) employment of defense cost-sharing as a bargaining chip. Such maneuvers have repercussions for global dynamics with American isolationism, transnational dissemination of nationalist exceptionalism, and new strategic opportunities for revisionist powers seeking to alter the status quo.