Hint… It’s currently Patty Murray!

In the U.S. Senate, the President pro tempore presides over the proceedings in the absence of the Vice President, who is the Senate's official presiding officer.

The President pro tempore is typically the longest-serving member of the majority party and is third in the line of presidential succession, following the Vice President and the Speaker of the House. This role, while largely ceremonial, involves overseeing Senate sessions and maintaining order. The position underscores the Senate's respect for seniority and experience among its members. In practice, day-to-day presiding duties are often delegated to junior senators to provide them with parliamentary experience.