If both the President and the Vice President can no longer serve, who becomes President?

The Speaker of the House becomes President if both the President and the Vice President can no longer serve. This is established in the Presidential Succession Act of 1947 and is also supported by the Constitution. The line of succession is designed to ensure continuity of government, and the Speaker of the House is next in line after the Vice President. This position is significant as the Speaker is an elected member of the House of Representatives, representing the legislative branch, which highlights the balance of powers within the federal government.

The other options presented do not follow this established line of succession. The Secretary of State, while a high-ranking official, is not next in line. Similarly, the Chief Justice of the Supreme Court and the President Pro Tempore of the Senate do not come before the Speaker. Thus, the role of the Speaker is crucial for ensuring stable leadership in times of crisis.