 | |||||||||||||||||
| |||||||||||||||||
| |||||||||||||||||
 County results Hatfield: 50–60% 60–70% 70–80% Cook: 50–60% | |||||||||||||||||
| |||||||||||||||||
| Elections in Oregon |
|---|
 |
The 1978 United States Senate election in Oregon took place on November 7, 1978. Incumbent Republican Senator Mark Hatfield was re-elected to a third term in office, defeating Democrat Vernon Cook.
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Republican | Mark Hatfield (incumbent) | 159,617 | 65.66% | |
| Republican | Bert W. Hawkins | 43,350 | 17.83% | |
| Republican | Robert D. Maxwell | 24,294 | 9.99% | |
| Republican | Richard L. Schnepel | 15,628 | 6.43% | |
| Write-in | All others | 197 | 0.07% | |
| Total votes | 243,086 | 100.00% | ||
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Democratic | Vernon Cook | 151,754 | 58.32% | |
| Democratic | John Sweeney | 41,599 | 15.99% | |
| Democratic | Jack A. Brown | 35,211 | 13.53% | |
| Democratic | Steve Anderson | 30,066 | 11.56% | |
| Republican | Mark Hatfield (incumbent, write-in) | 1,106 | 0.39% | |
| Write-in | All others | 552 | 0.21% | |
| Total votes | 260,197 | 100.00% | ||
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Republican | Mark Hatfield (incumbent) | 550,615 | 61.66% |  7.94 | |
| Democratic | Vernon Cook | 341,616 | 38.26% |  7.90 | |
| Write-in | All others | 737 | 0.08% | ||
| Total votes | 892,968 | 100.00% | |||
| Republican hold | Swing | ||||
The 1990 United States Senate elections were held on Tuesday, November 6, 1990, with the 33 seats of Class 2 contested in regular elections. Special elections were also held to fill vacancies. The Democratic Party increased its majority with a net gain of one seat from the Republican Party. The election cycle took place in the middle of President George H. W. Bush's term, and, as with most other midterm elections, the party not holding the presidency gained seats in Congress. Until 2022, this had been the only election cycle where only one U.S. Senate seat flipped parties.
The 1984 United States Senate elections were held on November 6, with the 33 seats of Class 2 contested in regular elections. They coincided with the landslide re-election of President Ronald Reagan in the presidential election. In spite of the lopsided presidential race, Reagan's Republican Party suffered a net loss of two Senate seats to the Democrats, although it retained control of the Senate with a reduced 53–47 majority. Democrats defeated incumbents in Illinois and Iowa, and won an open seat in Tennessee, while Republicans defeated an incumbent in Kentucky.
The 1980 United States Senate elections were held on November 4, coinciding with Ronald Reagan's victory in the presidential election. The 34 Senate seats of Class 3 were contested in regular elections. Reagan's large margin of victory over incumbent Jimmy Carter gave a huge boost to Republican Senate candidates, allowing them to flip 12 Democratic seats and win control of the chamber for the first time since the end of the 83rd Congress in January 1955.
The 1978 United States Senate elections were held on November 7, in the middle of Democratic President Jimmy Carter's term. The 33 seats of Class 2 were contested in regular elections. Special elections were also held to fill vacancies.
The 1972 United States Senate elections were held on November 7, with the 33 seats of Class 2 contested in regular elections. They coincided with the landslide re-election of Republican President Richard Nixon. Despite Nixon's landslide victory, Democrats increased their majority by two seats. The Democrats picked up open seats in Kentucky and South Dakota, and defeated four incumbent senators: Gordon Allott of Colorado, J. Caleb Boggs of Delaware, Jack Miller of Iowa, and Margaret Chase Smith of Maine. The Republicans picked up open seats in New Mexico, North Carolina, and Oklahoma, and defeated one incumbent, William B. Spong Jr. of Virginia.
The 1966 United States Senate elections were elections on November 8, 1966, for the United States Senate which occurred midway through the second term of President Lyndon B. Johnson. The 33 seats of Class 2 were contested in regular elections. Special elections were also held to fill vacancies. With divisions in the Democratic base over the Vietnam War, and with the traditional mid-term advantage of the party not holding the presidency, the Republicans took three Democratic seats, thereby breaking Democrats' 2/3rds supermajority. Despite Republican gains, the balance remained overwhelmingly in favor of the Democrats, who retained a 64–36 majority. Democrats were further reduced to 63–37, following the death of Robert F. Kennedy in June 1968.
The 1968 United States Senate election in Oregon was held on November 5, 1968. Incumbent Democratic U.S. Senator Wayne Morse was seeking a fifth term, but narrowly lost re-election to 36 year-old Republican State Representative Bob Packwood in a very close race.
The 1974 United States Senate election in Ohio took place on November 5, 1974. It was concurrent with elections to the United States House of Representatives. Incumbent Democratic U.S Senator Howard Metzenbaum was running for election his first full term after he was appointed in 1974 by Ohio governor John J. Gilligan to fill out the Senate term of William B. Saxbe, who had resigned to become United States Attorney General. Metzenbaum lost the primary election to John Glenn, who went on to win the general election and win every county in the state. Metzenbaum would later be elected in the other U.S. Senate seat in 1976 and worked with Glenn until he retired from the post in 1994.
The 1978 United States Senate election in Michigan was held on November 7, 1978. Incumbent Republican U.S. Senator Robert P. Griffin ran for re-election to a third term, but was defeated by the Democratic candidate, Detroit City Council President Carl Levin.
The 1978 United States Senate election in Alaska was held on November 7, 1978. Incumbent Republican U.S. Senator Ted Stevens was re-elected to a third term in office, defeating Democrat Donald Hobbs.
The 1978 United States Senate election in Tennessee took place on November 7, 1978, to elect the U.S. Senator from the state of Tennessee. Two-term popular incumbent Republican U.S. Senator, Howard Baker, who had served as United States Senate Minority Leader since 1977, won reelection over first-time candidate and Democratic Party activist Jane Eskind.
The 1978 United States Senate election in Alabama was held on November 7, 1978. Incumbent Democratic U.S. Senator John Sparkman decided to retire and Alabama Supreme Court Chief Justice Howell Heflin was elected to succeed him.
The 1978 United States Senate election in Arkansas took place on November 7, 1978. Incumbent U.S. Senator John L. McClellan had died the previous December, leaving the seat vacant. Interim appointee Kaneaster Hodges Jr. did not run to the full seat, and was succeeded by Governor of Arkansas David Pryor.
The 1972 United States Senate election in Oregon took place on November 7, 1972. Incumbent Republican Senator Mark Hatfield was re-elected to a second term in office, defeating Democrat Wayne Morse.
The 1972 United States Senate election in Arkansas took place on November 7, 1972. Incumbent U.S. Senator John L. McClellan was re-elected to a sixth term in office, defeating U.S. Representative David Pryor in a hotly contested primary. In the general election, McClellan easily defeated Republican physician Wayne Babbitt. This was McClellan's final campaign; he died in his sleep in 1977. Pryor was elected Governor of Arkansas in 1974 and won the race to succeed McClellan in 1978.
The 1978 United States Senate election in Iowa took place on November 7, 1978. Incumbent Democratic Senator Dick Clark ran for re-election to a second term but was defeated by Republican former Lieutenant Governor Roger Jepsen. This was the last time until 2014 that a Republican would win Iowa's class 2 Senate seat.
The 1978 United States Senate election in Kansas took place on November 7, 1978. Incumbent Republican Senator James B. Pearson did not run for re-election to a third full term.
The 1978 United States Senate election in Kentucky took place on November 7, 1978. Incumbent Senator Walter Dee Huddleston won reelection to a second term. As of 2023, this was the last time Democrats and/or anyone other than Mitch McConnell won the Class 2 Senate seat in Kentucky.
The 1978 United States Senate election in New Hampshire took place on November 7, 1978. Incumbent Democratic Senator Thomas J. McIntyre ran for re-election to a fourth term but was defeated by Republican Gordon J. Humphrey.
The 1984 United States Senate election in Oregon took place on November 6, 1984. Incumbent Republican U.S. Senator Mark Hatfield was re-elected to a fourth term in office, defeating Democratic State Senator Margie Hendriksen. As of 2022, this is the last U.S. Senate race in Oregon where every county voted for the same candidate.
