He doesn't have the power to abolish 2a, he just has the ability to tell his DOJ to not investigate matters when his administration's agents violate it. This constitutes a massive abuse of executive power, fostering a culture of impunity and abuse but we all should understand that if and when executive and legislative power fall out of the hands of this admin, these sorts of crime have very long statutes of limitations and accountability (if belated) is entirely in the cards