In Dred Scott vs Sandford case, the supreme court in 1957 slaves was not a citizen of United States and was never intended to be included in neither the Declaration of Independence nor the Constitution. The opinion of the court on this matter was that blacks are not even included on the right to sue
The court further interpreted that, neither the class of persons who had been imported as slaves, nor their descendants, whether they had become free or not, were included in the Declaration of Independence nor Constitution.
