Election 1940 Results
Each election opens in its own mode: the forecast before the votes are counted, the live count while races are still too close to call, and the results once every race is decided.
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1940 US Senate election in Illinois
C. Wayland Brooks (Republican) beat James M. Slattery (Democrat) in Illinois in 1940, 50.1% to 49.6%, a margin of 0.5 points and 20,827 votes. (This was a special election.)
Early projection, based on early and incomplete polling: the likely matchups, each weighted by the betting markets' odds of both nominations, not a result. Each county is its 2024 presidential margin moved by its state's projected swing; set a national vote and every state, district and county moves by the same amount from our projection. Colours run in 100 steps from a safe Republican to a safe Democratic margin. Boundaries: US Census Bureau.
Special election
| Candidate | Party | Votes | Share |
|---|---|---|---|
| C. Wayland Brooks won | Republican | 2,045,924 | 50.1% |
| James M. Slattery | Democratic | 2,025,097 | 49.6% |
| All other candidates | 15,142 | 0.4% | |
| Total | 4,086,163 |
Illinois Senate elections we hold
| Year | Winner | Margin |
|---|---|---|
| 2022 | Tammy Duckworth (D) | D+15.3 |
| 2020 | Richard J Durbin (D) | D+16.0 |
| 2016 | Tammy Duckworth (D) | D+15.1 |
| 2014 | Dick Durbin (D) | D+10.9 |
| 2010 | Mark Kirk (R) | R+1.6 |
| 2008 | Richard J. Durbin (D) | D+39.3 |
| 2004 | Barack Obama (D) | D+42.9 |
| 2002 | Richard J. Durbin (D) | D+22.3 |
| 1998 | Peter G. Fitzgerald (R) | R+2.9 |
| 1996 | Richard J. Durbin (D) | D+15.4 |
| 1992 | Carol Moseley-Braun (D) | D+10.2 |
| 1990 | Paul Simon (D) | D+30.1 |
| 1986 | Alan J. Dixon (D) | D+31.4 |
| 1984 | Paul Simon (D) | D+1.9 |
| 1980 | Alan J. Dixon (D) | D+13.5 |
| 1978 | Charles H. Percy (R) | R+7.9 |
| 1974 | Adlai Stevenson III (D) | D+24.9 |
| 1972 | Charles H. Percy (R) | R+24.9 |
| 1968 | Everett Dirksen (R) | R+6.4 |
| 1966 | Charles H. Percy (R) | R+11.0 |
| 1962 | Everett Dirksen (R) | R+5.7 |
| 1960 | Paul H. Douglas (D) | D+9.4 |
| 1956 | Everett Dirksen (R) | R+8.4 |
| 1954 | Paul H. Douglas (D) | D+7.1 |
| 1950 | Everett Dirksen (R) | R+8.1 |
| 1948 | Paul H. Douglas (D) | D+10.5 |
| 1944 | Scott W. Lucas (D) | D+5.6 |
| 1942 | C. Wayland Brooks (R) | R+6.8 |
| 1938 | Scott W. Lucas (D) | D+3.0 |
| 1936 | James H. Lewis (D) | D+15.8 |
| 1932 | William H. Dieterich (D) | D+6.2 |
| 1930 | James H. Lewis (D) | D+33.3 |
| 1926 | Frank L. Smith (R) | R+3.7 |
| 1924 | Charles S. Deneen (R) | R+28.2 |
| 1920 | William B. McKinley (R) | R+40.0 |
| 1918 | Medill McCormick (R) | R+5.6 |
| 1914 | Lawrence Y. Sherman (R) | R+1.7 |