And all of them- long since- will have ceased to have much to do with people like us- that is to say people without power or the hunger for power. The people they mostly consort with are those they can do deals with, those who can give them money or deliver support.
That's the nature of politics.
Whoever gets in they'll be beholden to the same baronial powers, in hock to the same military-industrial complex. It'll be nice to have a change of face at the top- and if that face turns out to be black or female it'll be a cheering indication of how social attitudes are changing- but that's all it'll be.