Foreign policy refers to how a nation interacts with other nations to achieve its goals. The president and congress both play roles in shaping U.S. foreign policy. The president can do so through responding to foreign events or proposing legislation. Congress oversees executive actions and passes bills directing foreign policy. Major historical policies include the Marshall Plan, which provided aid to postwar Europe, and agreements forming NATO and the UN to promote international cooperation. Current issues involve organizations working to end conflicts and hunger worldwide. Foreign policy ultimately affects domestic issues like gas prices and trade.