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1936 turnover counties casting between 10,000 and 100,000 votes

Philadelphia, PA (892,750) (1.96% of nat'l vote) Erie, NY (342,208) (0.75% of nat'l vote) Essex, NJ (319,441) (0.70% of nat'l vote) Essex, MA (222,999) (0.49% of nat'l vote) Worcester, MA (210,764) (0.46% of nat'l vote) Monroe, NY (210,523) (0.46% of nat'l vote) Bergen, NJ (181,878) (0.40% of nat'l vote) Hartford, CT (176,318) (0.39% of nat'l vote) Fairfield, CT (163,263) (0.36% of nat'l vote) Franklin, OH (158,047) (0.35% of nat'l vote) Union, NJ (132,097) (0.29% of nat'l vote) Camden, NJ (123,742)   Stark, OH (96,612) (0.21% of nat'l vote) Mahoning, OH (90,858) (0.1990% of nat'l vote) New Castle, DE (85,766) Kent, MI (85,304) Dauphin, PA (83,500) Polk, IA (79,460) Mercer, NJ (77,534) Rensselaer, NY (68,621) (0.15% of nat'l vote) Atlantic, NJ (64,688) Schenectady, NY (59,407) Winnebago, IL (53,989) Blair, PA (52,597) Trumbull, OH (50,329) Bucks, PA (48,895) New London, CT (47,703) Burlington, NJ ...

County flips in 1900, 1904, and 1908

1908 Parker '04 - Taft '08 (anti-trend): 61 in 14 states . 1. Baltimore City, MD (103,423) 2. Suffolk, MA (95,539) 3. Hudson, NJ (85,796) 4. Jefferson, KY (54,700) Roosevelt '04 - Bryan '08 : 219 in 24 states . 1. Denver, CO (65,707) 2. Jackson, MO (59,760) 3. Montgomery, OH (42,615) 4. York, PA (30,771) 5. Douglas, NE (30,713) 6. Northampton, PA (23,145) 7. Allen, IN (22,513) 8. Vigo, IN (22,342) 9. Buchanan, MO (18,513) 10. Wyandotte, KS (18,259) 11. Madison, IN (17,204) 12. Lancaster, NE (16,453) 13. Adams, IL (16,314) 14. Pueblo, CO (15,937) 15. Kenton, KY (15,777) 16. Licking, OH (15,166) 17. Tuscarawas, OH (14,205) 18. Allen, OH (13,557) 19. Richland, OH (12,326) 20. Dubuque, IA (11,855) 21. Macoupin, IL (11,664) 22. Boulder, CO (11,629) 23. Darke, OH (11,623) 24. Washington, OH (11,607) 25. Seneca, OH (11,512) 26. Hancock, OH (10,781) 27. Cass, IN (10,344) 28. Wayne, OH (10,084) Data missing for Texas, but in 1916, only Harris, Dallas, Bexar, and Tarrant Countie...

Turnover counties in 1900, 1904, and 1908

Roosevelt '04 - Bryan '08 Arkansas: 8 California: 4 Colorado: 25 (including Denver) Georgia: 2 Idaho: 3 Illinois: 16 Indiana: 28 Iowa: 11 Kansas: 9 Kentucky: 4 Maryland: 3 Minnesota: 4 Missouri: 11 (including Jackson) Montana: 5 Nebraska: 45 Nevada: 6 Ohio: 15 Pennsylvania: 5 South Dakota: 2 Tennessee: 1 Texas: 6 (including El Paso) Virginia: 2 West Virginia: 1 Wisconsin: 3 Parker '04 - Taft '08   Alabama: 5 Arkansas: 5 Florida: 1 Georgia: 16 Kentucky: 3 (including Jefferson) Maryland: 2 (including Baltimore City) Massachusetts: Suffolk Missouri: 1 New Jersey: Hudson North Carolina: 16 Tennessee: 1 Texas: 4 Virginia: 2 West Virginia: 3  --- Bryan '00 - Roosevelt '04 Alabama: 1 Arkansas: 9 California: 15 Colorado: 32 Georgia: 6 Idaho: 12 Illinois: 24 Indiana: 22 Iowa: 6 Kansas: 22 Kentucky: 2 (including Kenton) Maine: 1 Michigan: 1 Minnesota: 4 Missouri: 26 Montana: 11 Nebraska: 35 Nevada: 14 North Carolina: 2 Ohio: 11 Oregon: 5 Pennsylvania: 7 South Dakota: 7 Te...

County flips in 1928

Davis '24 - Hoover '28 Alabama: 22 (including Jefferson) Arizona: Gila  Arkansas: 7 Colorado: 2 Delaware: Kent Florida: 37 (including Hillsborough, Duval, and Dade) Georgia: 18 Illinois: 9 Indiana: 14 Kentucky: 38 Maryland: 10 (including Baltimore County) Mississippi: 3 Missouri: 28 Nebraska: 1 Nevada: 1 New Mexico: 10 North Carolina: 42 (including Mecklenburg, Forsyth, Guilford, and Buncombe) Ohio: 6 Oklahoma: 37 Pennsylvania: 4 Tennessee: 6 (including Davidson) Texas: 126 (including Dallas, Harris, and Tarrant) Virginia: 54 (including Richmond City) West Virginia: 14 Total: 491 Coolidge '24 - Smith '28 California: San Francisco  Colorado: 8 Connecticut: New Haven Idaho: Fremont Illinois: 7 Iowa: 4 Kansas: Ellis Louisiana: Assumption Massachusetts: 4 Minnesota: 3 Missouri: 3 Montana: 2 Nebraska: 6 Nevada: 2 New Hampshire: Hillsborough New York: 9 North Dakota: 5 Pennsylvania: 3 (including Lackawanna) Rhode Island: 2 South Dakota: 1 Texas: Guadalupe, Kinney  Utah: 2 Ver...

1924 county flips

Cox '20 - Coolidge '24 Florida: Pinellas  Indiana: 4 Kentucky: 5 Maryland: Cecil Michigan: Manistee Missouri: 1 New Mexico: 1 North Carolina: 1  Ohio: 3 Texas: 10 Total: 28 Harding '20 - Davis '24 Alabama: 3 Arizona: Gila, Santa Cruz Arkansas: 8  Colorado: La Plata, Montezuma Florida: Broward, Osceola Georgia: 14 Illinois: 9 Indiana: 11 Kentucky: 3 Louisiana: 13 Maryland: 5 Missouri: 19 Nebraska: 5 Nevada: Ormsby New Jersey: Hudson New Mexico: 3 North Carolina: 8 Ohio: 3 Oklahoma: 24 Pennsylvania: Fulton Tennessee: 10 Texas: 15  Virginia: 13 West Virginia: 11 Total: 185 Cox '20 - La Follette '24 Montana: Mineral  Nevada: Clark Total: 2 Harding '20 - La Follette '24   California: 14 Colorado: Dolores Idaho: 10 Illinois: Clinton Iowa: 7 Minnesota: 40 Montana: 18 Nebraska: 8 Nevada: 7 North Dakota: 32 South Dakota: 18 Texas: Gillespie Washington: 5 Wisconsin: 61 Wyoming: Sweetwater Total: 224

FDR '40-Dewey '44 counties

Arkansas: Benton, Madison California: Imperial, Inyo, Mono, San Benito, Sutter Colorado: Alamosa, Clear Creek, Gilpin, Mineral, Ouray, Pitkin, Summit, Teller Connecticut: Fairfield, Tolland Delaware: Sussex Georgia: Pickens Idaho: Boundary, Butte, Cassia, Latah, Lemhi, Minidoka, Owyhee, Valley, Washington Illinois: Alexander, Coles, Effingham, LaSalle, Moultrie, Peoria, Saline, Schuyler, Shelby, Wabash, White, Williamson Indiana: Bartholomew, Cass, Crawford, Dearborn, Gibson, Hancock, Harrison, Howard, Jackson, Jay, Ohio, Posey, Putnam, Shelby, Vermillion, Washington, Wells Iowa: Carroll, Dallas, Emmet, Fremont Kansas: Cherokee, Crawford, Sedgwick Kentucky: Bell, Breckinridge, Fleming, Garrard, Lawrence, Magoffin, Washington Maine: Kennebec Maryland: Allegany, Anne Arundel, Baltimore County, Calvert, Caroline, Frederick, Howard, Montgomery, St Mary's, Somerset, Washington, Worcester Michigan: Menominee, Presque Isle Minnesota: Murray, Wilkin Missouri: Cass, Cole, Greene, Knox, Maco...

Largest red counties in every state in which the Democratic vote share declined in 2020

In 2020, red counties in which Joe Biden's vote share was lower than Hillary Clinton's were relatively rare. (There were a conspicuous number of large blue counties [and some small blue counties] where the Democratic vote share went down in 2020, as alluded to here ; these include Los Angeles and Santa Clara Counties, CA; Broward, Dade, Palm Beach, and Osceola Counties, FL; Lake County, IN; Hudson County, NJ; The Bronx, Brooklyn, Queens, Manhattan, and Rockland County, NY; Philadelphia County, PA; and Cameron, El Paso, and Hidalgo Counties, TX. Some smaller ones include Imperial, CA; Jasper, SC; Santa Cruz, AZ; and of course, most, although not all, of the counties Trump flipped in 2020.) Of course, much of this could be attributed to the shrinkage of the third-party vote in 2020, and indeed, was. As Savannah Guthrie summarises Chuck Todd's half-stated implications on election night, 'You're saying if there was a third-party vote that drew votes from Clinton in 201...