Nothing, in theory, but I don't think any amendment can get enough legislature votes to pass and be ratified right now, and the Powers That Be are absolutely terrified of what might come out of a Constitutional Convention. Anything could happen: gun control, equal rights for women, gay marriage, abortion rights, a requirement that presidents must divest all businesses and show tax returns prior to inauguration, right to strong encryption without back doors or key escrow, technology privacy and personal data ownership... anything.

So then we'll need masks and privacy-enhancing shoes.