Can the US president run again if they lose an election once?

For example, if McCain loses this election, could he run again next time?

Public Comments

1. Sure. But he will be even older. Probably not likely
2. yes..they are not barred from trying to win...once they win , they can only serve 2 terms..then no more running for them..they are done.
3. Certainly
4. yes
5. Yes, in fact William Jennings Bryan ran three times (and lost all).
6. Well if they did not win the election sure they can run again but after serving 2 terms no . and its a damn shame Bill can't run again .
7. Yes. Thos. Dewey ran against Roosevelt twice.
8. Yes if he's alive :) LOL Actually I like McCain so no disrespect!