The 14th Amendment
The 14th Amendment was passed by Congress on June 13, 1866 and ratified on July 9, 1868. This amendment explains that "no state shall deny to any person equal protection of the law."
For more information: http://www.14thamendment.us/amendment/14th_amendment.html
For more information: http://www.14thamendment.us/amendment/14th_amendment.html