Do you have a source for your story?
I would like the source, too, if you get it. :)
The tradition comes from Bahar al-Anvar (meaning Oceans of Light) by Mullah Majlisi, a magnum opus in 132 volumes and the basis of modern Shiite Islam.
According to the tradition, Imam Ali Ibn Abi-Talib (the prophet’s cousin and son-in-law) prophesied that at the End of Times and just before the return of the Mahdi, the Ultimate Saviour, a “tall black man will assume the reins of government in the West.” Commanding “the strongest army on earth,” the new ruler in the West will carry “a clear sign” from the third imam, whose name was Hussein Ibn Ali. The tradition concludes: “Shiites should have no doubt that he is with us.”
In a curious coincidence Obama’s first and second names–Barack Hussein–mean “the blessing of Hussein” in Arabic and Persian. His family name, Obama, written in the Persian alphabet, reads O Ba Ma, which means “he is with us,” the magic formula in Majlisi’s tradition.
http://www.cogwriter.com/news/prophecy/barack-obama-in-islamic-prophecy/