http://www.cnn.com/ALLPOLITICS/analysis/rothenberg/1998/10/20/(scroll down)
Did a little Googling, to view the history of comparing politicians to Hitler. Lo and behold... this little gem. Sure enough, a Republican candidate (gasp!) aired an ad comparing his Dem opponent to Hitler (egads!). Here it is:
'Hitler' ad an issue in Kentucky
Kentucky Senate The open seat race between Republican Jim Bunning and Democrat Scotty Baesler has turned into a bare-knuckled battle focusing on Social Security, taxes, education and the two campaigns' tactics.
Polling suggests that Bunning and Baesler are in a tight fight, though Republican insiders appear to be more upbeat and optimistic than their Democratic counterparts.
The hottest topic of the Senate race has been a Bunning ad that used footage of Baesler at a Kentucky political event. The spot included close-up shots of the Democrat, pounding the lectern and screaming about a number of issues. In the background of the ad was Wagner, the German composer identified with Adolph Hitler.
Baesler's campaign complained bitterly about the ad, arguing that the camera shots and music were intended to make him look like Hitler. The Louisville Courier-Journal, the largest newspaper in the state, editorialized about the ad, strongly criticizing the Bunning campaign. But the Republican's campaign decided against pulling the ad or altering it in any way, fearing that that would be seen as an admission of guilt and prolong the issue. Pot, meet kettle.