The Seventeenth Amendment altered fundamentally the way most senators had been chosen for 124 years. Prior to its ratification, United States senators were usually selected by the legislatures of the various states, two from each state. They served for six years, with a third of the Senate up for state legislative reelection every two years. If vacancies in Senate seats arose between elections, the state legislatures typically chose a replacement to serve the remainder of the unexpired term. If a vacancy occurred at a time when a state legislature was out of session, the governor of the state
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