The Senate President Pro Tempore
When the US Vice President is absent or acting as President, his/her Senate duties fall to the US Senate President Pro Tempore, who by tradition is the longest-serving Senator of the majority party.
the vice president serves as president of the senate
The president pro tempore serves as the head of the senate in place of the vice president- APEX
The Vice President of The United States of America.
lieutenant governor
The President pro tempore is the second highest ranking official of the United States Senate . He is a senator who is elected to his position by the Senate.In actual practice it is not unusual for the vice-president and pro temp to both be absent. In that case another senator or, I think, one of the staff serves as time-keeper and keeps track of who has the floor.
The Vice President is the President of the Senate.
The vice president's main official function is to succeed the president in the event of their death, resignation, or removal from office. Additionally, the vice president serves as the President of the Senate and has the power to cast tie-breaking votes. They may also be assigned specific roles and responsibilities by the president.
The vice president of the US is the president of the US senate.
The vice-president of the United States is the president of the US senate.
Vice president
president-protempore