Final answer:
The next three successors in the president's line of succession after the President and Vice President are the Speaker of the House of Representatives, the President pro tempore of the Senate, and the Secretary of State.
Step-by-step explanation:
The question asks for the next three successors in the president's line of succession after the President and Vice President. According to the Presidential Succession Act of 1947 and further clarified by the 25th Amendment, the next three positions in the line of succession are:
- Speaker of the House of Representatives
- President pro tempore of the Senate
- Secretary of State
If the Vice-President assumes the role of President, he or she may select a new Vice President, subject to confirmation by both houses of Congress.
If both the President and Vice President are unable to fulfill their duties, the Speaker of the House would become President, and the President pro tempore of the Senate would become Vice President.
After these positions, succession continues with the Cabinet members, beginning with the Secretary of State, the Secretary of the Treasury, and the Secretary of Defense.