A big unknown is the bllod spilled on the way to the nomination, particularly race and gender. One scenario is that Hillary knocks Obama out on Super Tuesday and Obama doesn't get nasty. Another scenario is that Obama wins South Carolina and competes impressively on Super Tuesday. If that happens Hillary will get nasty and Obama's fans will get pissed. An Obama candidacy with pissed women and Hispanics or a Hillary candidacy with pissed Blacks and wingnuts are difficult cadidacies to assess at this point.