What fraction of the Senate is elected every two years?

The Senate is structured to ensure continuity within the legislative body, and this is achieved through staggered elections. There are 100 senators in total, with each state represented by two senators. To maintain this stability, only about one-third of the Senate, or 33 to 34 senators, face reelection every two years during regular election cycles. By holding elections for one-third of its members at a time, the Senate prevents a complete turnover and allows for experienced members to remain in office while new members are elected. This system is designed to balance the need for fresh perspectives with the importance of institutional knowledge, thereby ensuring that there is a continuity of leadership and policy-making over time. Thus, the correct fraction of the Senate that is elected every two years is one-third, making the answer accurate.