I may missing something but it seems plain enough in the thirteenth amendment? “ 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.”
To this point, if US prison labor isn't "slavery" or "involuntary servitude", then removing the words between "except" and "shall" would be noncontroversial.
Similarly, if there was political consensus that US companies shouldn't own or hire slaves overseas, then the bit starting with "within" would be easy to remove as well.
None of this has had any chance of happening since the thirteenth amendment was passed (not even during BLM). It's pretty clear that a big chunk of the US's leaders are pro-slavery.
