Georgia 1992 Senatorial General Runoff:
Wyche Fowler (84 counties): 49.35%Paul Coverdale (75 counties) 50.65%a.k.a. the year Georgia Democrats began to realize their hatred of runoff electionsNot shaded. Wyche Fowler had a large collapse of support among many in the LGBT community in Midtown Atlanta due to comments made prior (I believe it had something to do with Jesse Helms). Many say he ended up losing the election because some LGBT defected in the general election, followed by a collapse of motivation for LGBT turnout in the runoff, which is kinda hilarious when you think about it.
In 1986: