In his first 100 days, Donald Trump’s foreign policy has significantly altered global dynamics, impacting longstanding alliances and international relations. He has cut off aid to Ukraine amid its conflict with Russia, brokered and then failed to maintain a ceasefire in Gaza, and launched military strikes in Yemen, leading to perceptions of the US as an “unpredictable ally.” These actions have emboldened rivals and strained relationships with key allies, marking a dramatic shift in US engagement on the world stage.