With all the talk of delegates and superdelegates and fighting dirty vs. fighting clean, I want to throw something out there. It seems to be an accepted truth out there that Gore lost the 2000 election because he insisted on staying true to his principles.
First off, if by "staying true to his principles", they mean accepting the ruling of the Supreme Court, well, yeah. Like it or not, they are the Supreme Court. I wouldn't want a President who didn't accept the constraints placed on his (or her) power by the Constitution.
But let's flash back to Florida in November of 2000. Gore and Bush both tried to game the recount, fighting for the result most likely to get them elected. In other words, they both fought dirty, and Gore lost the fight. That made it hard to then make an argument from principle.
But if Gore had said, from the very start, "let's count every single vote", he could have made that argument. And he might well have won.