The Dem party has already said Biden is unfit to be the candidate. Their leader is not good enough to campaign, but they still keep him in the office over 3 months before the election while running the VP as the candidate. Why not replace him with the VP, that’s how this is supposed to work. Why keep Biden as president for months?

Just because the US has one of the oldest and buggiest constitutions, doesn’t help this make any sense.