[Diego1618]

The second dual citizen to become president was Chester Alan Arthur. Arthur was the son of an Irish immigrant (William Arthur). President Arthur’s father also became a naturalized U.S. Citizen when Chester was 14 years old. Chester A. Arthur was also a British subject under British law. But unlike President Buchanan, Chester A. Arthur’s British nationality was rescinded with the passage of the British Naturalization Act of 1870 (When Chester A. Arthur was 41 years old).

Chester Arthur lied about his father's citizenship records and, in fact...destroyed all of his own personal papers afterwards in a continuing effort to conceal the truth. He was quite aware he was not considered a "Natural Born Citizen".

Vice President Chester Arthur succeeded Garfield to the presidency after Garfield's assassination and was never elected as the prime candidate.

[Nero Germanicus]

Here is a copy of William Arthur’s 1843 Certificate of Naturalization:
http://naturalborncitizen.files.wordpress.com/2008/12/william-arthur-naturalization.pdf

William Arthur was a well known Protestant Minister in New England and his son never lied about his father’s status because it wasn’t an issue.