hold. | nowrap | |- ! | William Jennings Bryan Dorn | | Democratic | 19461948 1950 | Incumbent re-elected. | nowrap | |- ! | James Mann | | Democratic | 1968 | Incumbent re-elected. | nowrap | |- ! | Thomas S. Gettys | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | John L. McMillan | | Democratic | 1938 | Incumbent re-elected. | nowrap | |} South Dakota |- ! | Ben Reifel | | Republican | 1960 | | Incumbent retired.New member elected.Democratic gain. | nowrap | |- ! | Ellis Yarnal Berry | | Republican | 1950 | | Incumbent retired.New member elected.Democratic gain. | nowrap | |} Tennessee |- ! | Jimmy Quillen | | Republican | 1962 | Incumbent re-elected. | nowrap | |- ! | John Duncan Sr. | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | Bill Brock | | Republican | 1962 | | Incumbent retired to run for U.S. senator.New member elected.Republican hold. | nowrap | |- ! | Joe L. Evins | | Democratic | 1946 | Incumbent re-elected. | nowrap | |- ! | Richard Fulton | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! | William Anderson | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | Ray Blanton | | Democratic | 1966 | Incumbent re-elected. | nowrap | |- ! | Ed Jones | | Democratic | 1969 | Incumbent re-elected. | nowrap | |- ! | Dan Kuykendall | | Republican | 1966 | Incumbent re-elected. | nowrap | |} Texas |- ! | Wright Patman | | Democratic | 1928 | Incumbent re-elected. | nowrap | |- ! | John Dowdy | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- ! | James M. Collins | | Republican | 1968 | Incumbent re-elected. | nowrap | |- ! | Ray Roberts | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! | Earle Cabell | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | Olin E. Teague | | Democratic | 1946 | Incumbent re-elected. | nowrap | |- ! | George H. W. Bush | | Republican | 1966 | | Incumbent retired to run for U.S. senator.New member elected.Republican hold. | nowrap