[mlmr]

He didnt have dual citizenship, he had pool citizenship.

lousy attempt to be clever.

Take care and good night!

[monkeyshine]

Yes, you can have dual citizenship. It is not "legal" but it is considered "tolerated" and this decision is entirely at the discretion of the State Department. They could some day decide not to tolerate Dual Citizenship.

However, their hands are largely tied by numerous supreme court rulings. Clearly, a person born in the USA is a US citizen. But so is a person born to American citizens while abroad. But such a person may also be a citizen of the foreign country, because the foreign country may also have birth right citizenship like the USA.

For example, a person born in the USA to a French man and American woman is an American. But by French law, he is also French, having been born of a French man. Likewise, a person born in France to American citizens is French by French law, but also American as per the US Constitution.

The Supreme Court has basically held that citizenship is irrevocable unless expressly surrendered in writing at a government office, and that citizenship is just a question of law. If the US Law and French Law both make a person a citizen of their respective countries, there's not much you can do about it except change the laws (in this case, the Constitution).