I think that's the core of the problem. I don't believe there are any laws or rulings addressing any of these issues. Of course congress won't touch on that subject without a complete overhaul of the way things operate in that dumpster fire (all of them). The only current method to remove a sitting president is through impeachment. Here's to hoping the current republicans have the berries to not nominate the cancer for 2024.
And the sad part is there are no laws preventing him from running and winning office if a guilty verdict was the outcome for any federal indictments. Who'd thunk it, the Forefathers didn't foresee this happening. Apologies for grammar.