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who takes over as president if the speaker of the house dies
After speaker of the House of Representatives, the United States presidential line of succession follows with president pro tempore of the Senate.
who takes over as president if the president pro tempore of the senate dies
After president pro tempore of the Senate, the United States presidential line of succession follows with the eligible heads of federal executive departments who form the president's Cabinet.
what statute establishes the united states presidential line of succession
In the United States, a Presidential Succession Act is a federal statute establishing the presidential line of succession.

Question: what parts of the constitution authorize the statute
Self-contained rewrite: what parts of the u.s. constitution authorize the presidential succession act