The president shouldn’t be able to issue a self-pardon for crimes they may have committed, and the Constitution needs to be amended to clarify that before a rogue president tries it and puts the constitutionality of a self-pardon in the hands of the courts.
This is a partisan bill aimed at the president that’s unlikely to be ratified by enough states to amend the Constitution. A president that has to issue a self-pardon would be so politically toxic they’d either have to resign or face a hostile Congress for the remainder of their term.