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Ballotpedia's coverage of elections held on March 3, 2015, was limited. Select races were covered live, and all results will be added once the merger is complete.
|Historical Representation to the U.S. Senate by Party from Arizona|
|Class 1 Senators from Arizona|
|Henry Fountain Ashurst||1912-1941||Democratic|
|Ernest W. McFarland||1941-1953||Democratic|
|Barry M. Goldwater||1953-1965||Republican|
|Paul J. Fannin||1965-1977||Republican|
|Dennis W. DeConcini||1977-1995||Democratic|
|Class 3 Senators from Arizona|
|Marcus A. Smith||1912-1921||Democratic|
|Ralph H. Cameron||1921-1927||Republican|
|Carl T. Hayden||1927-1969||Democratic|
|Barry M. Goldwater||1969-1987||Republican|