Which of the choices below significantly undermined states' rights?

passage of the Kansas-Nebraska Act

the secession of the Confederate states

the Supreme Court's Dred Scott decision

ratification of the Fourteenth Amendment

Question

Which of the choices below significantly undermined states' rights?

passage of the Kansas-Nebraska Act

 the secession of the Confederate states

 the Supreme Court's Dred Scott decision

 ratification of the Fourteenth Amendment

anonymous · Answer

The Fourteenth Amendment.  It enforced a definition of citizenship on the states, thus overturning Dred Scott v. Sanford, and provided a mechanism for enforcing the Bill of Rights on states.  Thus citizens could now sue their states in Federal court for abridging their constitutional rights.