Respuesta :

Answer:

He ruled african americans were and could not be citizens :)

Explanation:

Answer:

That all blacks could never be U.S citizens.

Explanation:

In 1857 the U.S supreme court declared that no African-Americans, free or enslaved could be U.S citizens. At the time the chief justice was Roger B. Taney and this was during the Dred Scott court case

Please mark brainliest ;)