I've always felt that 'Trumpism' only works with Donald and there has been yet to be another person who can fill that role to his base
I think Vance has about as much pull as Pence...which is not much. But Vance is a little better with the snark than Pence, so I think his base might like him a little bit more
But I do think if he was killed in something like this, it might be enough to get his base to support Don Jr? Jez I hope that scenario doesn't happen