After the President and Vice President die in office, the Speaker of the House will become president. After them, the President Pro Tempore of the Senate. The order of succession goes on and on after this.
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If both die then the Speaker of the House becomes president
The Secret Service
The Vice president
John Tyler.
The Speaker of the House.
The vice president.
vice president
The Vice-President would become President.
vice president
The Vice President
vice president