Good question! That's the $2,000,000 dollar question...or however much he's spent (time and money) fighting the release of that information.
I see your question, and raise another:
HOW CAN A NATURAL BORN CITIZEN'S STATUS BE "GOVERNED" BY GREAT BRITAIN?
“When Barack Obama Jr. was born on Aug. 4,1961, in Honolulu, Kenya was a British colony, still part of the United Kingdom’s dwindling empire. As a Kenyan native, Barack Obama Sr. was a British subject whose citizenship status was governed by The British Nationality Act of 1948. That same act governed the status of Obama Sr.‘s children.http://fightthesmears.com/articles/5/birthcertificate.html
It can't. Of course not. Yet, right there, on his campaign web site F.T.S., it's stated that a foreign government "governed" Barry from birth and the reason it did, was that Barry inherited that foreign citizenship by way of his foreign national father (no matter where he was born).
How, then, could he possibly be a "Natural Born Citizen" of the U.S.?
Barry Soetoro, the divided citizen at birth!
http://www.jeffersonsrebels.blogspot.com
Furthermore: Hawaii's Territorial Law, Chapter 57 - "VITAL STATISTICS, I", shown beginning pg 23 of 29, (the law in effect in 1961) allowed baby's born anywhere in the world to be eligible to apply for a Hawaii birth certificate based on the word of 1 relative. That is how a foreign born baby could get a HI BC on record, which in turn generates the "birth announcements" in the newspapers.