First, it should be noted that since the President is a U.S. citizen (born in Hawaii), the only passport he has ever held would be a U.S. passport. He has received a U.S. passport on a number of occasions, since passports must be renewed every few years. Given that he has done a lot of traveling during his life, we may safely assume that he has renewed his passport whenever it was necessary to do so.
As a private citizen, it is not publicly known when Barack Obama obtained his US passport.
I'm sure he already had a passport when he was elected.
Yes, he needs a passport, but no, it's not like everyone else's. The president (any US president-- not just Mr. Obama) receives a special "diplomatic" passport, as do his immediate family, and any top officials who might be traveling with him. When the president travels to other countries, that travel is coordinated for him by the State Department.
His own.
Of course. He is an American citizen, so he would certainly hold an American passport.
US citizenship.
Passport is a requisit.
You Don't. You need to have a passport in order to have a passport number.
The naturalization number is not located on the US passport. The naturalization number can be found on the Naturalization certificate.
You'll need a US PASSPORT to return to the US.
in order to leave or return the US you must have a passport.
No. The US is not a member of the EEU/EEA.
Maybe there is dual citizenship, but you need to contact passport services to find out.