The largest swing in each election by county for each state. I'll do Michigan first, and I'll be taking requests for other states. Eventually hopefully I'll end up hitting all 50 states. 
Michigan
2004
To Bush-Lake
To Kerry-Ontonagon
2000
To Bush-Ontonagon
To Gore-Ingham
1996
To Dole-Keweenaw
To Clinton-Macomb
1992
To Bush-Delta
To Clinton-Osceola
1988
To Bush-Gogebic
To Dukakis-Tuscola
1984
To Reagan-Oscoda
To Mondale-Gogebic
1980
To Reagan-Branch
To Carter-Kent
1976
To Ford-Kent
To Carter-Gogebic
1972
To Nixon-Macomb
To McGovern-Washtenaw
1968
To Nixon-Crawford
To Humphrey-Wayne
1964
To Goldwater-Wayne
To Johnson-Crawford
1960
To Nixon-Missaukee
To Kennedy-Huron
1956
To Eisenhower-Alcona
To Stevenson-Otsego
1952
To Eisenhower-Missaukee
To Stevenson-Keweenaw
1948
To Dewey-Houghton
To Truman-Lapeer
1944
To Dewey-Kalkaska
To Roosevelt-Keweenaw
1940
To Willkie-Huron
To Roosevelt-Marquette
1936
To Landon-Clare
To Roosevelt-Keweenaw
1932
To Hoover-Houghton
To Roosevelt-Gladwin
1928
To Hoover-Barry
To Smith-Dickinson
1924
To Coolidge-Manistee
To Davis-Cass
1920
To Harding-Kent
To Cox-Manistee
1916
To Hughes-Huron
To Wilson-Otsego
1912
To Taft-Ingham
To Wilson-Alger
1908
To Taft-Baraga
To Bryan-Kent
1904
To Roosevelt-Arenac
To Parker-Keweenaw
1900
To McKinley-Antrim
To Bryan-Oscoda
1896
To McKinley-Presque Isle
To Bryan-Gratiot
How do you think Oakland County's going to swing in 2006? DeVos intentionally picked a running mate from the county because he understands it is the quintessential swing county.
