| Term | Senator | % Correct |
|---|---|---|
| 2007-Present | Jon Tester | 100%
|
| 1978-2014 | Max Baucus | 100%
|
| 1953-1977 | Mike Mansfield | 100%
|
| 2015-Present | Steve Daines | 100%
|
| 1923-1947 | Burton K. Wheeler | 83%
|
| 1989-2007 | Conrad Burns | 83%
|
| 2014-2015 | John Walsh | 83%
|
| 1978 | Paul G. Hatfield | 83%
|
| 1913-1933 | Thomas J. Walsh | 83%
|
| 1899-1900 | William A. Clark | 83%
|
| 1901-1907 | William A. Clark | 83%
|
| 1947-1953 | Zales Ecton | 83%
|
| 1934-1961 | James E. Murray | 67%
|
| 1977-1989 | John Melcher | 67%
|
| 1961-1978 | Lee Metcalf | 67%
|
| 1890-1895 | Thomas C. Power | 50%
|
| 1895-1901 | Thomas H. Carter | 50%
|
| 1905-1911 | Thomas H. Carter | 50%
|
| 1890-1893 | Wilbur F. Sanders | 50%
|
| 1911-1923 | Henry L. Myers | 33%
|
| 1933-1934 | John E. Erickson | 33%
|
| 1907-1913 | Joseph M. Dixon | 33%
|
| 1895-1899 | Lee Mantle | 33%
|
| 1901-1905 | Paris Gibson | 33%
|