He is using a tactic here where he knows 100% that something is not going to happen so he calls for it in an attempt to divert blame and appear virtuous.
I will keep saying this... Vance doesn't care to be VP... If trump wins he's going to say trump is unfit for office and take control shortly after ... I know he doesn't have the following like trump but that man is up to no fucking good and has more than half a brain cell functioning...
Trump's cult makes up for A LOT. His attempt to usurp power will more than result in an executive official order to ensure his, and anyone who even has a hint of disloyalty, permanent compliance.