Senators are representatives of the various states that make up the United States of America. Each state elects two senators, making a total of 100. The total number of senators can only change if a state is added to the union.
To qualify as a senatorial candidate, an individual must be a U.S. citizen for a minimum of 9 years. The candidate must be at least 30 years of age, and a resident of the state he or she wishes to represent.Learn more about Branches of Government