Many countries do not "allow" dual citizenship but they usually do not know when one of their citizens cross that line. How would they know? The USA knows her citizens are sometimes dual with another nation, but she does not RECOGNIZE any citizenship but to her.
It makes no difference to the USA if Obama signed on to continue his allegiance to a country that doesn't allow dual citizenship. There are probably many non-USA citizens living here who are active citizens of Indonesia, so Indonesia would never had to know IF (big if!) Obama was also an American.
Therefore nothing he did as an 18 year old renewing an Indonesian passport compromises his USA citizenship. The USA does not care (except that perhaps post 9/11 they focus on some of these people if they know about them).
Somehow we are not connecting on this. My bottom line in this conversation is that nothing Obama has done re Indonesia has legally affected his (purported prior) American citizenship. It doesn't even matter what he swore on an Indonesian document; the USA doesn't know or care.
What really does matter here is his natural born status, or his eligibility status in the eye of the American people. One would assume that NONE OF US (except the liberals who hate America) wishes a leader, of ANY PARTY, who as an adult has claimed formal allegiance to another land. I believe this would stop my cousin from running for President (the one who served in Israel's army). I believe this would curtail ANY candidate's ambitions.
This assumes he did have an Indonesian passport, which I very strongly suspect, and that he did something when he was older to hold himself out as an Indonesian citizen such as renew a passport, which I also suspect. However, we do not know that as a fact.
I suspect it too.
One other thing that neither of us has touched upon is that there is a lot of circumstantial evidence that Obama never had American citizenship from birth. There is some evidence that his BC is fraudulent, and there is the situation of him needing as a teen to use someone else's SS number to get his first job, and that he still used that fraudulent SS number when he filled out his military service document, and even later as an adult. What was the problem in his documentation that caused all that? And some have said that his Senatorial USA passport was the first one he'd ever had. Then how could he have traveled to Indo and Pahki without one? If he used his Indonesian passport, this might mean that Indonesian was the first nationality he ever had, and perhaps he had to be "adopted" by Soetoro even to travel to Indo the first time, or was he on Stanley's pass as a small child?
Therefore nothing he did as an 18 year old renewing an Indonesian passport compromises his USA citizenship. The USA does not care
I've told you what the law is, and you just ignore it and your counter-argument is just to say crap off the top of your head. You can repeat this 20 times, it doesn't make it any more true.
You ask "how would they know?" As a matter of law, it DOESN'T MATTER if the US knows of it at the time or not.
The expatriation happens BY OPERATION OF LAW. No one has to tell the US government. Obviously, someone can expatriate themselves and get away with it if the US government never finds out. But whether the US government learns of it or not, as a matter of law the expatriation is not dependent on notice to the US government.
So we have another passport issue for Obama here. How did he stay for "months" in Bali, Indonesia on a US passport under which a tourist visa would only be for 30 days? (Other sources suggest Michelle did not travel to Bali with him.)
Did he use an Indonesian passport to travel to Indonesia to try to write his book?