Article I, Section 3, Clause 4 designates the Vice President as President of the Senate, with authority to cast tie-breaking votes when senators divide equally. This represents the only regular constitutional duty the framers assigned beyond receiving electoral vote tallies. The Vice President has no vote on Senate matters unless senators are equally divided. The Constitution does not require the Vice President to break ties, allowing discretion in exercising this power. Since 1789, vice presidents have cast 268 tie-breaking votes. Vice President Kamala Harris holds the record with 33 tie-breaking votes, surpassing John C. Calhoun''s previous record of 31. John Adams ranks third with 29. These votes have proven decisive on major legislation, judicial confirmations, and procedural matters, particularly during periods of narrow partisan divisions. The Vice President also formally presides over counting electoral ballots in presidential elections, as specified in the 12th Amendment. In practice, vice presidents rarely attend routine Senate sessions, delegating presiding duties to the President pro tempore and junior senators. Vice presidents typically appear for major votes, ceremonial occasions, and situations where their tie-breaking authority might prove necessary.