In his first 100 days, President Trump has redefined U.S. foreign policy with a transactional approach, focusing more on direct national interests rather than ideological goals. He has engaged in renewed nuclear negotiations with Iran, emphasizing diplomatic solutions but warning of non-involvement in conflict should talks fail. Trump's administration has launched a significant offensive against Yemen's Houthi rebels, indicating a shift from previous tit-for-tat strategies to a more aggressive stance. Domestically, Trump's policies have sparked European nations to bolster their defense spending in anticipation of potential U.S. withdrawal from NATO commitments. Meanwhile, his imposition of steep tariffs on China aims to address trade imbalances and intellectual property issues but risks straining economic relations further.

Trump's foreign policy is characterized by transactional diplomacy, moving away from the ideological approaches seen during Biden's presidency, with global leaders now engaging with the U.S. based on mutual benefits rather than shared democratic values.

Negotiations with Iran have been a focal point, with Trump signaling an interest in a new nuclear deal while making it clear that the U.S. will not support military actions by allies like Israel without exhausting diplomatic efforts.

The administration has launched a robust military campaign against Yemen's Houthi fighters, targeting over 800 sites, marking a departure from Biden's retaliatory strike policy and aiming to eliminate threats to American military and trade routes.

Trump's stance on the Ukraine-Russia conflict is to push for a resolution, contrasting with Biden's open-ended support, yet his efforts have not yet resulted in peace, as evidenced by ongoing negotiations and skepticism about Russia's intentions.

International defense dynamics are shifting as European countries plan to increase military spending significantly in response to Trump's critiques of NATO allies' contributions and the temporary halt of U.S. aid to Ukraine.

Trump's tariff strategy towards China aims to penalize the country for unfair trade practices and intellectual property theft, with the goal of reviving U.S. manufacturing, despite China's reluctance to negotiate under the pressure of high tariffs.

Trump's strategic interests include the control of Greenland and the Panama Canal, emphasizing geopolitical advantages and resource potentials, though these ambitions have met resistance and increased tensions with Denmark and other affected parties.