Hillary Clinton has proved during the past few months that she is a fighter, that she is tenacious, and that she is in the race to win. There's just one problem. She's already lost.
No matter how you define victory, Barack Obama holds an insurmountable lead in the race to earn the Democratic nomination. He leads in the one metric that matters most: the pledged delegates chosen directly by Democratic voters. But he also leads in the popular vote, the number of states won and money raised. Still, Obama's advantages aren't large enough to allow him an outright victory. He needs the 20 percent of party delegates who aren't bound to a candidate. It's with these superdelegates that Clinton has staked her ephemeral chances.