Slavery is a horrible practice of forcibly abducting, controlling and 'owning' human beings.
Slavery hasn't existed in the United States for over 150 years.
Slavery has become an excuse for extremely bad behavior by modern descendants of people who actually were affected by it.
Slavery still exists all over the world, but not in the United States.
The United States is a country that elected a half-black man to the office of President. The vast majority of those who voted for him were white.