Several media outlets have dropped this point about Kamala Harris, but they haven't framed it correctly. As former California AG, Harris appears to have actively held prisoners against a Supreme Court order in order to utilize them for slave labor.

Notes:
-Text of 13th Amendment: https://constitution.congress.gov/constitution/amendment-13/
-"How Kamala Harris Fought to Keep Nonviolent Prisoners Locked Up" https://prospect.org/justice/how-kamala-harris-fought-to-keep-nonviolent-prisoners-locked-up/
"California AG "Shocked" To Learn Her Office Wanted To Keep Eligible Parolees In Jail To Work" https://www.buzzfeednews.com/article/adamserwer/some-lawyers-just-want-to-see-the-world-burn
-"Kamala Harris’ A.G. Office Tried to Keep Inmates Locked Up for Cheap Labor" https://www.thedailybeast.com/kamala-harris-ag-office-tried-to-keep-inmates-locked-up-for-cheap-labor