Government.
The Vice President is known as the President of the Senate, so currently, Joe Biden fills the position. The President of the Senate may vote on a measure only when the vote is tied.
The President is the Head of State of the United States of America, and fills the same symbolic position that the Queen of Great Britain fills for Great Britain. In addition, the President is the chief executive officer of the government, filling the functional position filled in great Britain by the Prime Minister.
Vice President
The President pro tempore
the vice president.
the vice president.
The Speaker of the House of Representatives (John Boehner)
The Presidential Succession Act
After John Kennedy's assasination, the 25th Amendment was enacted stating tha the President would nominate a replacement which would have to be approved by a majority vote of the House of Representatives and Senate. Previously, the position was left unfilled.
political party leader
The President
The federal executive branch is headed by the President of the US.