As I recall, the Duke was so constantly on the defensive he didn't mount much of campaign. The W. Horton material, originally introduced during the primaries by Algore, the Duke's photo op in a tank, and his reply to a debate question about the death penalty for someone attacking his wife hurt him significantly. His VP candidate, Lloyd Bentsen, got off the line to Dan Quayle that he was no John Kennedy, but that may have been the team's highlight of the campaign.
As I recall.
As I recall, the Duke was so constantly on the defensive he didn't mount much of campaign. Well, shooting oneself in the foot isn't exactly offense, but I'm not sure I'd call it defense either...