Haley maybe I suppose.
But that would be weird.
Vance is the most pro Russia, anti Ukraine "republican" in the senate.
Haley is aggressively anti Russia, pro Ukraine.
I don't think Trump's base would go for Haley.
They call her a war monger.
Vance was good in theory for Trump's base as long as he was going to win anyway with Biden running.
A switch like that would make Trump look desperate but of course he IS desperate.