United States presidential line of succession

#	Office	Current officer
1	Vice President of the United States	Joe Biden (D)
2	Speaker of the House	John Boehner (R)
3	President pro tempore of the Senate	Patrick Leahy (D)
4	Secretary of State	John Kerry (D)
5	Secretary of the Treasury	Jacob Lew (D)
6	Secretary of Defense	Chuck Hagel (R)
7	Attorney General	Eric Holder (D)
8	Secretary of the Interior	Ken Salazar (D)
9	Secretary of Agriculture	Tom Vilsack (D)
--	Acting Secretary of Commerce	Rebecca Blank (D)[3]
--	Acting Secretary of Labor	Seth Harris (D)[3]
10	Secretary of Health and Human Services	Kathleen Sebelius (D)
11	Secretary of Housing and Urban Development	Shaun Donovan (D)
12	Secretary of Transportation	Ray LaHood (R)
13	Secretary of Energy	Steven Chu (D)
14	Secretary of Education	Arne Duncan (D)
15	Secretary of Veterans Affairs	Eric Shinseki (I)
16	Secretary of Homeland Security	Janet Napolitano (D)

 

Here's a wiki link on the subject:  http://en.wikipedia.org/wiki/United_States_presidential_line_of_succession