The term 'President ___ Tempore' refers to the President of the Senate, a position in the United States government. The President PRO Tempore is a member of the Senate who is elected by the majority party to preside over the Senate in the absence of the Vice President. This position is traditionally held by the most senior Senator of the majority party. The President PRO Tempore is responsible for presiding over debates, recognizing members to speak, and ruling on procedural matters.