The third person in the line is the President Pro Tempore of the Senate (normally the most senior US senator).
The succession is as follows:
Vice President
Speaker of the House of Representatives
President Pro Tempore of the Senate
First Answer:
The Speaker of the U.S. House of Representatives.
Second answer:
The line goes (President), Vice President, Speaker of the House of Representatives, President Pro Tempore of the Senate, Secretary of State, Secretary of Defense, ...
This means that either the Speaker of the House is third, or the President Pro Tem is. It's a matter of philosophy to decide if the President is in the line to succeed himself. I'd say no. Until his recent death, the President Pro Tem was Ku Klux Klansman Robert Byrd(D). The Senate decides who will fill this post. Byrd was elected by a unanimous vote of all Democrats in the Senate. Democrats are the majority party. Republicans supported John Bohnior(R).
The President pro tempore of the Senate is third in line to become President through the United States presidential line of succession. Second is the Vice President of the United States.
the vice president, which is also the head of the senate
The Speaker of the House is third in line according to Title 3 of the United States Code, section 19 .
the Squeaker of the Mouse
Vice President
He/she isn’t second, but third.
Clarify the presidential line of succession
Speaker of a house.
It specifies the full line of succession should the president no longer be able to serve. The Vice-President has always been second in line, but the Act specifies the next 18 places, including the Speaker of the House in 3rd, President pro tempore of the Senate in 4th, and on down the line of Cabinet Secretaries.
the Cabinet
Originally, congress was to decide who was next in line for office after the Vice President. The 25th Amendment changed presidential succession to what it is today.
Secretary of state
the Cabinet
presidential succession is the order in which the office of president is to be filled
He is third in line, just behind the Speaker of the House.
Third in line, after vice-president and speaker of the house.
The senate pro tempore is third in the line of presidential succession, behind the vice-president and the Speaker of the House. ( I hope this is what you want to know.)