(The Speaker is required by the Presidential Succession Act of 1947 to resign as he can act as President only "upon his resignation as Speaker and as Representative in Congress". Walken himself states that no one can serve in two branches of the government at once.)
Act of Parliament | Act | Statute Law Revision Act 1948 | United States presidential election, 2004 | Statute Law Revision Act 1888 | United States presidential election, 2008 | United States presidential election, 2000 | United States presidential election, 1884 | presidential election | Act of Congress | War of the Spanish Succession | United States presidential election, 1960 | Reform Act 1832 | Patient Protection and Affordable Care Act | Endangered Species Act | Digital Millennium Copyright Act | Clean Water Act | American Recovery and Reinvestment Act of 2009 | War of the Austrian Succession | National School Lunch Act | Statute Law Revision Act 1863 | Criminal Justice Act 1988 | Local Government Act 1972 | Barack Obama presidential campaign, 2008 | Americans with Disabilities Act of 1990 | John McCain presidential campaign, 2008 | United States presidential election, 1992 | United States presidential election, 1988 | United States presidential election, 1972 | Racketeer Influenced and Corrupt Organizations Act |
If the President resigns or dies while in office, the successor is determined by the presidential line of succession, as specified by the United States Constitution and the Presidential Succession Act.