In a limited company, the liability of members or subscribers of the company is limited to what they have invested or guaranteed to the company.
The current President pro tempore of the Senate is Utah Republican Orrin Hatch. Elected on January 6, 2015, he is the 90th person to serve in this office.
A president pro tempore is the leader of the Senate when the Vice-President is not there. (pro tempore is Latin phrase which means for the time being.) Unlike the VP, he can also vote to create a tie, since he is a Senator. The position is elected by the Senators.