How often are Senators up for election according to the framers' design?

The framers of the Constitution designed the Senate to provide stability and continuity within the legislative branch. Senators serve six-year terms, with elections held for approximately one-third of the Senate every two years. This staggered election system was intended to ensure that not all Senators would face election at the same time, allowing the Senate to maintain experienced members while also incorporating new representatives. This design addresses the need for both accountability to the electorate and a degree of institutional stability, as it avoids the potential disruption caused by simultaneous turnover of all Senators. Hence, the correct answer reflects the unique term structure established by the framers, ensuring a balance between renewal and continuity in governance.