Why the Clintons are fighting so hard for now and why Obama must win

One thing that had stumped me until a few days was why Hillary was fighting hard when the math and odds are so clearly against her. Then the Pennsylvania primary happened and I figured it out. Clinton has realized that she's fighting a generational battle. The exit polls bear this out. The under 40 set and the Millennials have decided that Obama is their guy. Now for the Clintons to see the next generation as vehemently opposed to them is dangerous to their SOP. Also the future doesn't bode well because of obvious next step. The currently under 40 set will hold more wealth and be even more motivated if their guy wins. In other words, the Clintons are drawing the line in the sand for the baby boomers to extend the fight for at least one more round. The only way for the Clintons to stop the flood gates is to win now and win ugly to the point that the under 40 set has had their political wills utterly destroyed. This is also why Obama has to win. If he doesn't win the present, an entire generation filled with promise will be totally disillusioned and may never recover. It may not be the reason why he originally chose to reason. However, it's the biggest reason left why he has to succeed and manage to do so while staying above the fray.