It is probably something that needs to be resolved at some point in the future, or any branch could try it. I'm sure there are a fair amount of rich people that would pay someone dearly to invalidate Trump.

If Obama (or Biden) ends up being invalidated due to fraud I think there will be an amendment created to lawfully outline the process in case future presidents do something similar - like the 25th amendment but with more teeth. Maybe include some stuff like some laws can be revoted on but with an equal number of dems/reps so it can't be ramrodded in by the currently-ruling party. Or make a law for a state-by-state referendum where the state legislatures vote and each state's resulting vote is counted as 1 of 50. The majority of the state votes wins.

I don't know. I just know it will be a huge cluster.