why doesn't Gore run again?

[Hawkeye]

Is there like some rule about loosing candidates running again or something, because I really think Gore should've ran again. I would vote for him in a minute over Bush, unlike Kerry who I think sucks tea bags and would rather have his twin who is at least is a better speaker, Bush. But Gore on the other hand besides being a great candidate, it would've been the rematch of 2000. Gore vs. Bush part 2- 2004 would've been the greatest election of all time. Now we are kind of in a loose- loose situation. So why can't Gore run for president again.