Secretary of state.
Speaker of the house
The Speaker of the House of Representatives.
According to the U.S. order of succession, if both the president and the vice president are, for whatever reason, unable to serve, then the Speaker of the House of Representatives becomes acting president. If he/she also cannot serve, the next individuals in line are the President pro tempore of the Senate and then the Secretary of State.
The Speaker of the House of Representatives. If they can not serve, then the President pro tempore becomes the President.
Either the president elects a new vice-president or the Speaker of the House of Representatives becomes vice-president
The speaker of the house of representatives-----currently Nancy Pelosi
If both the President and the Vice President are unable to serve, then the Speaker of the U.S. House of Representatives would become President.
If both the president and the vice president can no longer serve, the Presidential Succession Act of 1947 dictates the line of succession. The Speaker of the House of Representatives would become the president, followed by the President pro tempore of the Senate, and then the members of the president's cabinet in a specific order. This ensures a clear line of succession in the event of the president and vice president's inability to serve.
The President appoints a replacement, who must be approved by both houses of Congress.
If both the President and the Vice President are unable to serve, then the Speaker of the U.S. House of Representatives would become President.
If a president is impeached and removed from office, the vice president ascends to the presidency. This is outlined in the U.S. Constitution. If both the president and vice president are unable to serve, the next in the line of succession is the Speaker of the House.
If both die then the Speaker of the House becomes president