Barack Hussein Obama II is an American politician who served as the 44th president of the United States from 2009 to 2017. A member of the Democratic Party, Obama was the first African-American president of the United States
Because once it is denied to one person, no one is protected by the law.
U.S. foreign policy shifted away from "isolationism" to international involvement, since the US started to steer away from Washington's idea that it should remain as detached from foreign issues as possible.
The Union used a large naval blockade to stop most of the South's cotton trade. I hope this helps!