Final answer:
The Speaker of the House is third in line for the presidency, following the president and vice president.
Step-by-step explanation:
The Speaker of the House is third in line for the presidency, following the president and vice president. The individual third in line for the presidency, behind only the president and the vice president (v-p), is the Speaker of the House. This role is immediately followed in the line of succession by the President pro tempore of the Senate and then members of the president's cabinet starting with the Secretary of State. Although the vice president has a significant role as the president of the Senate and may vote in the case of a tie, it's the Speaker of the House who stands next in line after the vice president for the presidency, according to the presidential succession act.