Not any more...
(Obama Senior had the same nationality at birth as I did)..
I was born British in Dec 1948 but one month later in Jan 1949 when my mother registered my birth the newly legislated New Zealand citizenship had kicked in so I was registered as a New Zealander...
I had a New Zealand passport but could have qualified for a British passport due to my birthdate...
In Aug I will have been in the US for 40 years...
I became an American citizen in 1975...
Before I was sworn in as an American I had to RENOUNCE my New Zealand citizenship by raising my hand and saying so and by signing away my rights and claims and confirming the renouncement......
until one month later at the naturalization ceremony I was a citizen of no country at all...no legal passport etc..
I was legally here in accordance with my Alien Regitration Card and status but I could not have left and then come back...My NZ passport was no longer any good from the moment I renounced my NZ citizenship...
Although I had the protection and rights and privileges as a legal resident of the United States they were dependent on my appearing at the ceremony to become an American citizen...
I knew fully what was involved and I did what was necessary to become an American citizen, gladly...although it was hard to renounce the country of my birth...
But how people claim a dual citizenship is beyond both me and the American naturalization laws...
You don’t need to “claim” dual citizenship. Sometimes you are just granted citizenship of another country. Maybe from your parents before you were of age, or through marriage. Only naturalized Americans have to give up their previous affiliations, and even then they are probably serial considered citizens from the other country still.
I believe that every American from Mexico is still considered Mexican by Mexico. There is nothing anyone can do about that.
This is why, when we finally make the definition for Natural Born Citizen a part of our Constitution, we need to be aware that if there is a clause that our President may not be a citizen of another country, it would be easy for other countries to disqualify a candidate by declaring him a citizen of their land.
Interesting; people who claim dual citizenship often misunderstand what it means. I have family that was born in Europe; they eventually became US citizens, and the US will recognize them as nothing else. However, some countries do not force you to renounce your “other” citizenship when you take US citizenship; therefore, the country of their birth will recognize citizenship of either country, though the US does not. Whatever exceptions people claim, that is the law: the US considers your former citizenship surrendered when you take US citizenship.