The President Pro Tempori (I think that is the correct spelling -- it is usually just called the President Pro Tem) who is elected by the Senate
Yes, but if the Vice president cannot attend, the president pro tempore takes over.
The Vice-president presides over the Senate. If the vice-pesident is anable to act, the President pro tempore of the Senate takes over.
the President pro tempore of the Senate
The senior member of the majority party of the Senate, who would then be the President Pro Tem of the Senate (or President pro tempore for the full name)
vice president
The Vice President presides over the Senate, but he cannot vote on issues unless there is a tie. He also cannot address the Senate unless given permission by another Senator. Basically the Vice President is a hands-off babysitter for the Senate.
The Vice President
The VP presides over the US Senate but can not vote unless there is a tie.
the vice president
The Speaker of the House.
The US presidential line of succession is as follows. After president it is Vice President, or Speaker of House, or President pro tempore of the Senate, or Secretary of State, or Secretary of treasury, secretary of defense, or Attorney General in that order.
The vice-president is in charge of the senate and takes over for the president if he dies, resigns, or is unfit to perfom his duty.