Link , Link , Link , Link , Link , Link , Link , Link , Link , Link , Link , Link , Link , Link , Link , Determining which American leader bears the most responsibility for escalating tensions with Iran is complex, as multiple administrations contributed over decades. Donald Trump's 2018 JCPOA withdrawal and 2020 Soleimani strike directly heightened tensions, risking conflict. George W. Bush's 2002 "axis of evil" speech and 2003 Iraq War indirectly strengthened Iran's regional influence, setting a confrontational tone. Barack Obama's 2015 JCPOA aimed to de-escalate but faced criticism for enabling Iran's aggression. Evidence suggests Trump's actions had the most immediate impact, but shared responsibility exists across leaders, reflecting the intricate history of U.S.-Iran relations.]