Answer:
Barack Obama was president of the United States from 2009 to 2017, being elected twice as a candidate for the Democratic Party.
During his government he carried out many changes regarding the foreign policy of the country with respect to the policies of his predecessor George W. Bush, especially with regard to the nuclear disarmament of nations that are not members of the UN Security Council, as well as its pacifist policies in the Middle East after the War on Terror carried out by the previous government. These policies earned him the recognition of being awarded the Nobel Peace Prize in 2009.
