Worthy cause, Catchem. Well done, sir.
The President Pro Tempore of the U.S. Senate, also known as the president pro tem, is the second-highest-ranking official of the United States Senate.
The United States Constitution states that the Vice President of the United States is the President of the Senate, despite not being a senator, and that the Senate must choose a president pro tempore. The president pro tempore, or "president for a time," is elected by the Senate and is, by custom, the senior member of the majority party.
The Constitution provides for a president pro tempore to preside over the Senate in the absence of the vice president. Except for the years from 1886 to 1947, the president pro tempore has also been included in the presidential line of succession