Now we know the presidential tickets, both historical:
Democrats: Barack Obama and Joe Biden. First ever black person to be presidential nominee.
Republicans: John McCain and Sarah Palin. First ever woman to run on a Republican presidential ticket.
What's usually left unspoken: the other half of the ticket is a straight white man.
Of course the Democrats have been doing it longer. Shirley Chisholm could have been the first black woman to head a presidential ticket, but the US wasn't quite ready for that in 1970s.
And apparently we're still not quite ready thirty years later.
But we're getting there! Change happens over generations. Oh, wait, it has been generations!