According to the U.S. Constitution the right to citizenship is based on two situations: people born on U.S. territory persons born from U.S. parents. The law stipulates that a person born in territories under U.S. jurisdiction automatically becomes an American citizen. Also, with some exceptions, children born of American parents that live on a foreign territory, receive the U.S. citizenship.
The conspiracy theory, which denies the legitimacy of the election of President Obama, comes from circles opposing Obama. Launched before the elections, the President’s legitimacy issue, occasionally becomes a top news in newspapers or online. According to this theory Obama was born in Kenya, not Hawaii, and the birth certificate presented is a fake.
This theory is based on the fact that the Hawaiian birth certificate is a short version, not the common long format. According to other theories, Obama has a dual or multiple nationalities: British, his biological father being born in Kenya that belonged to the Commonwealth, Indonesian, by his second father and possibly the U.S. citizenship. If all this is true Obama does not meet the constitutional requirement of a natural-born citizen.
All these allegations were rejected by the Supreme Court of the United States. None of these cases was brought before a jury so, in January 8th, 2009, Obama was confirmed by the Congress as the elected President of the United States.