No one: Everyone is dead.
The question originally asked who becomes President if the President dies (the Vice President), and who becomes President if he subsequently dies (Speaker of the House), and so on (President pro tempore, then Secretary of State, other Cabinet secretaries, members of Congress, etc.).
The complete Presidential line of succession is at the related link.
The Vice President
vice president, & if he dies, the speaker of the house
If the president dies then the vice president takes office if the vice president dies then the speaker of office is president
Yes! The Vice President, the the Speaker of the House. This is the current line of succession: http://www.patriotstoolbox.org/america/presidentiallineofsuccession.htm
If the House eaker dies, a new speaker is elected by the House.
If he dies in office, then Dick Cheney becomes President.
The vice president
The Vice President
The vice-president
the vice president.
If both die then the Speaker of the House becomes president
The vice-president becomes the president.
If Obama dies in office, his vice President, Joe Biden, becomes the next President.
President pro tempore of the Senate becomes President.
The Vice President of America.
When the president dies the vice president becomes the president
vice president, & if he dies, the speaker of the house