Mahmoud Ahmadinejad (Born October 28th 1956) is the current President of Iran (assumed office August 3rd 2005)
Ahmadinejad was also the mayor of Iran's capital and largest city Tehran from June 20th 2003 until he became president of the country on August 3rd 2005.
Ahmadinejad's presidential term will expire in August 2009, he is running in Iran's 2009 presidential election because he is eligible for one more term as president.