U.S. President Barack Obama's foreign policy legacy rests in part on a foundation of unilateral actions that his successor Donald Trump could reverse with the stroke of a pen.
Due to take office on Jan. 20, Trump, the winner in Tuesday's election, campaigned at times to dismantle Obama's nuclear deal with Iran and to reimpose sanctions Obama eased on Cuba. Trump also disagreed with foreign policy decisions that included the way Obama has deployed troops abroad to combat Islamist militant groups.
In his most notable foreign policy achievements, Obama, a Democrat, used executive authorities that offered a convenient legal path around a Republican-controlled Congress committed to blocking his agenda.
