It’s been popping up in the news every so often these days. People, worried that Donald Trump might actually get elected after having tried to overturn the results of a legitimate election, are using Section Three of the Fourteenth Amendment as justification to keep him off the ballot in a number of states next year.
That was one of the post-Civil War amendments that ended slavery and gave rights to the former slaves. The particular section under consideration was added to prevent leaders of the Confederacy from taking office at any level where they could presumably work to destabilize the country (again).
The text is: