This depends on the country. Different countries have different limitations on who can be president and for how long.
The position of president is open once every 4 years, unless the sitting president is unable to complete his/her 4 year term for whatever reason. Obama ran in 2008, so he can choose to run again in 2012 or step down.
No he served two terms, he cannot run again.
Once a President has served two terms, that person is ineligible to run for President again.
No. He has been dead since Nov. 23, 1963 so that is impossible.
I think he can run again for president.
if you mean how many terms they can serve, they can only serve two four-year terms at once but they can run again after another president has been elected.
Because he should run for president
If he has only run once, he can run for a second term. However, If he has run twice, he cannot become president a third time.
No ex-president who served two terms can run again, in accordance with the 22nd Amendment. Jimmy Carter and George H.W. Bush each served only one term, and could run again and serve only one term.
NO BECAUSE HE HAD FINISHED IT.
Yes, gay people are allowed to run for president.
There have been no female presidents as of yet, but there have been women who have run for president.