Just to clarify, there are more than two people running for president, a fairly comprehensive list of candidates can be found on Wikipedia.
John McCain (Republican candidate)
Barack Obama (Democratic candidate)
Geraldine Ferraro (Democratic) in 1984 and Sarah Palin (Republican) in 2008.
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, currently, the two candidates up for election in the United States of America are Barack Obama, and Hillary Clinton. However, there is nothing to rule out the very small possiblity of the new president falling before the end of 2008, and leaving a slot for a new president.
No, he cannot. Ever since the US Constitution was amended in 1951, an American president may only run (we say "run" for re-election, rather than "stand"-- which is British) for two consecutive terms. President Obama was elected in 2008 and re-elected in 2012; thus, he is not allowed to run for another term.
a president can only run two terms
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.
The term of a president is 4 years, and they can run for two terms.
Two People - 2008 was released on: USA: 2008 (New York City, New York)
No, They can not run for two full terms. However,they may run for one more term in office as President of the United States.
two times
Officially, January 20, 2009. US presidents can not serve for more than two consecutive terms, so President Bush was not allowed to run again in 2008. Barack Obama was elected on November 4, 2008, and on January 20, 2009, President Bush officially left office and President Obama began his first term.