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How much of the Senate is up for election every two years?

About one-third of the Senate is up for election every two years.

Short AnswerAbout one-third
Explanation

Article I, Section 3 divides senators into three classes, so roughly a third of the seats are elected every second year. This staggering keeps the chamber continuous.

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Source

How Congress WorksHow Congress WorksTest Yourself: The Senate10 questions, with an explanation and source after each answer. How many will you get right?Start the Quiz

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