For this year at least, it’s too late to replace Trump on the ticket. Unless they replace Trump with Vance. That would comply with the rules. Sort of. Trump’s name would still be on the ticket. But Vance would take lead, and would pick a running mate.

There are two major factors that would keep this from becoming a reality. First is Trump will never step aside in favor of someone else.

Second is that Vance has negative charisma.