United States presidential line of succession
The United States presidential line of succession is the set order of United States federal government officials who may become or act as President of the United States if the incumbent president becomes incapacitated, dies, resigns, or is removed from office (by impeachment and subsequent conviction).
The line of succession is delineated by the United States Constitution and the Presidential Succession Act of 1947 as subsequently amended to include newly created cabinet offices. The succession follows the order of Vice President, Speaker of the House, President pro tempore of the Senate, and the cabinet, which currently has fifteen members, beginning with the Secretary of State.
The current presidential order of succession is:
Cabinet officers are in line according to the chronological order of their department's creation, or the department of which their department is the successor (the Department of Defense being successor to the Department of War and the Department of Health and Human Services being successor to the Department of Health, Education and Welfare).
To be eligible to serve as President, a person must be a natural-born U.S. citizen, at least thirty-five years of age, and a resident within the United States for at least 14 years. These eligibility requirements are specified both in the U.S. Constitution, Article II, Section 1, Clause 5, and in the Presidential Succession Act ().
...
Wikipedia