Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction.
Congress shall have power to enforce this article by appropriate legislation.
The twelfth amendment set up the electoral college which is still in effect today in out nations presidential elections.
This is a quick and accurate description of the twelfth amendment.
This video shows an example of past controversy created by the twelfth amendment.