2) Carlos Gutierrez born in Cuba - Ineligible
3) Elaine Chao born in Taiwan - Ineligible
4) The 1947 act has been modified several times with the addition of new cabinet positions, but the creation of the Department of Homeland Security in 2002 has caused controversy that has resulted in its secretary not yet being placed in the succession order.
Many in Congress feel the Secretary should be placed not at the bottom of the order as is the tradition, but higher in the order - the rationale being that, as the officer responsible for disaster relief and security, the Secretary would be more capable of acting as President than, say, the Secretary of Housing and Urban Development.
As of early 2005, the Secretary of Homeland Security has not been put into the line of succession. Senate Bill 442, approved by the Senate on July 27, 2005, would, if it were to become law, place the Secretary of Homeland Security after the Attorney General and before the Secretary of the Interior in the line of succession. That bill and a companion bill, H.R. 1455, are currently pending before the House of Representatives' Judiciary Committee.
Despite years of debate, the matter remains unresolved and as a result, the Secretary of Homeland Security is not among those constitutionally eligible to act as President under the act.
http://en.wikipedia.org/wiki/Presidential_Succession_Act_of_1947