Minnesota gubernatorial election, 1938
- Harold Stassen (R) – 678,839 (59.92%)
- Elmer Austin Benson (Farmer-Labor) (inc.) – 387,263 (34.18%)
- Thomas F. Gallagher (D) – 65,875 (5.82%)
- John William Castle (Industrial) – 899 (0.08%)
Minnesota gubernatorial election, 1940
- Harold Stassen (R) (inc.) – 654,686 (52.06%)
- Hjalmar Petersen (Farmer-Labor) – 459,609 (36.55%)
- Edward Murphy (D) – 140,021 (11.14%)
- John William Castle (Industrial) – 3,175 (0.25%)
Minnesota gubernatorial election, 1942
- Harold Stassen (R) (inc.) – 409,800 (51.60%)
- Hjalmar Petersen (Farmer-Labor) – 299,917 (37.76%)
- John D. Sullivan (D) – 75,151 (9.46%)
- Martin Mackie (Communist) – 5,082 (0.64%)
- Harris A. Brandborg (Industrial) – 4,278 (0.54%)
1944 Republican presidential primaries
- Douglas MacArthur – 662,127 (28.94%)
- Earl Warren – 594,439 (25.99%)
- John W. Bricker – 366,444 (16.02%)
- Thomas E. Dewey – 278,727 (12.18%)
- W. Chapman Revercomb – 91,602 (4.00%)
- Unpledged – 87,834 (3.84%)
- Harold Stassen – 67,508 (2.95%)
- Riley A. Bender – 37,575 (1.64%)
- Charles A. Christopherson – 33,497 (1.46%)
- Wendell Willkie – 27,097 (1.19%)
- Joe H. Bottum – 22,135 (0.97%)
- Franklin D. Roosevelt – 10,535 (0.46%)
- Edward Martin – 2,406 (0.11%)
- Everett Dirksen – 581 (0.03%)
- Others – 5,079 (0.22%)
1948 Republican presidential primaries
- Earl Warren – 771,295 (26.99%)
- Harold Stassen – 627,321 (21.96%)
- Robert Taft – 464,741 (16.27%)
- Thomas E. Dewey – 330,799 (11.58%)
- Riley A. Bender – 324,029 (11.34%)
- Douglas MacArthur – 87,839 (3.07%)
- Leverett Saltonstall – 72,191 (2.53%)
- Herbert E. Hitchcock – 45,463 (1.59%)
- Edward Martin – 45,072 (1.58%)
- Unpledged – 28,854 (1.01%)
- Arthur H. Vandenberg – 18,924 (0.66%)
- Dwight D. Eisenhower – 5,014 (0.18%)
- Harry S. Truman – 4,907 (0.17%)
- Henry A. Wallace – 1,452 (0.05%)
- Joseph W. Martin – 974 (0.03%)
- Alfred Eastlack Driscoll – 44 (0.00%)
- Others – 5,939 (0.21%)
1948 Republican National Convention
- Thomas E. Dewey – 1,094 (60.74%)
- Robert Taft – 274 (15.21%)
- Harold Stassen – 157 (8.72%)
- Arthur H. Vandenberg – 62 (3.44%)
- Earl Warren – 59 (3.28%)
- Dwight Herbert Green – 56 (3.11%)
- Alfred Eastlack Driscoll – 35 (1.94%)
- Raymond E. Baldwin – 19 (1.06%)
- Joseph W. Martin – 18 (1.00%)
- Carroll Reece – 15 (0.83%)
- Douglas MacArthur – 11 (0.61%)
- Everett Dirksen – 1 (0.06%)
1952 Republican presidential primaries
- Robert Taft – 2,794,736 (35.84%)
- Dwight D. Eisenhower – 2,050,708 (26.30%)
- Earl Warren – 1,349,036 (17.30%)
- Harold Stassen – 881,702 (11.31%)
- Thomas H. Werdel – 521,110 (6.68%)
- George T. Mickelson – 63,879 (0.82%)
- Douglas MacArthur – 44,209 (0.57%)
- Grant A. Ritter – 26,208 (0.34%)
- Edward C. Slettedahl – 22,712 (0.29%)
- Riley A. Bender – 22,321 (0.29%)
- Mary E. Kenny – 10,411 (0.13%)
- Wayne L. Morse – 7,105 (0.09%)
- Perry J. Stearns – 2,925 (0.04%)
- William R. Schneider – 580 (0.01%)
1952 Republican National Convention (1st ballot)
- Dwight D. Eisenhower – 595
- Robert Taft – 500
- Earl Warren – 81
- Harold Stassen – 20
- Douglas MacArthur – 10
Republican primary for Governor of Pennsylvania, 1958
- Arthur T. McGonigle – 578,286 (54.52%)
- Harold Stassen – 344,043 (32.44%)
- William S. Livengood – 138,284 (13.04%)
Philadelphia mayoral election, 1959
- Richardson Dilworth (D) (inc.) – 438,278 (65.60%)
- Harold Stassen (R) – 229,818 (34.40%)
1964 Republican presidential primaries
- Barry Goldwater – 2,267,079 (38.33%)
- Nelson Rockefeller – 1,304,204 (22.05%)
- James A. Rhodes – 615,754 (10.41%)
- Henry Cabot Lodge, Jr. – 386,661 (6.54%)
- John W. Byrnes – 299,612 (5.07%)
- William Scranton – 245,401 (4.15%)
- Margaret Chase Smith – 227,007 (3.84%)
- Richard Nixon – 197,212 (3.33%)
- Unpledged – 173,652 (2.94%)
- Harold Stassen – 114,083 (1.93%)
Republican primary for Governor of Pennsylvania, 1966
- Raymond P. Shafer – 835,768 (78.02%)
- Harold Stassen – 172,150 (16.07%)
- George J. Brett – 63,366 (5.92%)
1968 Republican presidential primaries
- Ronald Reagan – 1,696,632 (37.93%)
- Richard Nixon – 1,679,443 (37.54%)
- James A. Rhodes – 614,492 (13.74%)
- Nelson Rockefeller – 164,340 (3.67%)
- Unpledged delegates – 140,639 (3.14%)
- Eugene McCarthy – 44,520 (1.00%)
- Harold Stassen – 31,655 (0.71%)
- John A. Volpe – 31,465 (0.70%)
1968 Republican National Convention (1st ballot)
- Richard Nixon – 692
- Nelson Rockefeller – 277
- Ronald Reagan – 182
- James A. Rhodes – 55
- George Romney – 50
- Clifford Case – 22
- Frank Carlson – 20
- Winthrop Rockefeller – 18
- Hiram Fong – 14
- Harold Stassen – 2
- John V. Lindsay – 1
1978 Republican primary for the United States Senate from Minnesota
- Rudy Boschwitz – 185,393 (86.81%)
- Harold Stassen – 28,170 (13.19%)
1980 Republican presidential primaries
- Ronald Reagan – 7,709,793 (59.84%)
- George H. W. Bush – 3,070,033 (23.83%)
- John B. Anderson – 1,572,174 (12.20%)
- Howard Baker – 181,153 (1.41%)
- Phil Crane – 97,793 (0.76%)
- John B. Connally – 82,625 (0.64%)
- Unpledged delegates – 68,155 (0.53%)
- Ben Fernandez – 25,520 (0.20%)
- Harold Stassen – 25,425 (0.20%)
- Gerald Ford – 10,557 (0.08%)
- Bob Dole – 7,204 (0.06%)
1984 Republican presidential primaries
- Ronald Reagan (inc.) – 6,484,987 (98.78%)
- Unpledged delegates – 55,458 (0.85%)
- Harold Stassen – 12,749 (0.19%)
Minnesota's 4th congressional district, 1986
- Bruce F. Vento (DFL) (inc.) – 112,662 (72.88%)
- Harold Stassen (R) – 41,926 (27.12%)
1988 Republican presidential primaries
- George H. W. Bush – 8,258,512 (67.91%)
- Bob Dole – 2,333,375 (19.19%)
- Pat Robertson – 1,097,446 (9.02%)
- Jack Kemp – 331,333 (2.72%)
- Unpledged – 56,990 (0.47%)
- Pete DuPont – 49,783 (0.41%)
- Alexander M. Haig – 26,619 (0.22%)
- Harold Stassen – 2,682 (0.02%)
1992 Republican presidential primaries
- George H. W. Bush (inc.) – 9,199,463 (72.84%)
- Pat Buchanan – 2,899,488 (22.96%)
- Unpledged delegates – 287,383 (2.28%)
- David Duke – 119,115 (0.94%)
- Ross Perot – 56,136 (0.44%)
- Pat Paulsen – 10,984 (0.09%)
- Maurice Horton – 9,637 (0.08%)
- Harold Stassen – 8,099 (0.06%)
Republican primary for the United States Senate from Minnesota, 1994
- Rod Grams – 269,931 (58.17%)
- Joanell M. Dyrstad – 163,205 (35.17%)
- Harold Stassen – 22,430 (4.83%)
- John J. Zeleniak – 8,467 (1.83%)
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