Yes, it’s a crazy ideal and Sarah should not get involved. McCain should though, he would have standing, he was a candidate.
But he wasn’t eligible either having been born in a hospital in a town (Colon, I believe) Panama that was not on U.S. territory or military base at the time. You can see where that would put him in a very weak position to go after Obama which is maybe one reason McCain got the nomination when it appeared that he wasn’t doing well enough to get it.