“the government must affirmatively prove that its firearms regulation is part of the historical tradition that delimits the outer bounds of the right to keep and bear arms.”
This is a new twist from the Supremes. Gun laws must prove that they are in keeping with “historical tradition”. So, banning felons from owning guns is allowed, there’s an historical tradition for that.
So if there’s no historical basis, it won’t pass muster at the Supremes.