Yes, IF. The plane crash just puts us back where we started. If Hathaway's alive, he's still the real president. If he's not, there is no legitimate line of succession behind him so the Charelston Presidency is just as legitimate as anybody else's. Yeah, but that was the best scene of the whole episode! Right out of "Bonanza!" Pa Mason and the Mason Boys riding off to save Mama Mason and the young'un. That was classic!