What is the role of the Vice President in the Senate?

The role of the Vice President in the Senate is primarily to cast tie-breaking votes. This function is significant because the Vice President is not a regular member of the Senate and does not participate in its daily legislative decisions. However, in cases where the Senate is evenly divided on a vote—resulting in a tie—the Vice President has the authority to cast a vote that can determine the outcome. This unique power is outlined in the Constitution and underscores the Vice President's role as a critical player in maintaining the functionality of the Senate.

The other choices involve responsibilities typically held by Senate leaders or committee chairs, rather than the Vice President. For instance, leading Senate committees and overseeing the Senate's agenda are duties performed by Senate Majority leaders and committee heads. Serving as a spokesperson for the Senate also does not fall under the Vice President's responsibilities, as this role is more associated with Senate leadership or designated spokespersons who communicate the Senate's actions and positions. Thus, the primary and distinct constitutional role of the Vice President within the Senate remains that of casting tie-breaking votes.