Click here to watch "Bruce 'The Mud Man' Lunsford."

With less than 24 hours to go before voters head to the polls in Kentucky, businessman Greg Fischer is firing a last shot at his opponent in the Democratic Senate primary, health care executive Bruce Lunsford, in an effort to stage a last-minute comeback. Fischer was the first to go negative in the race, and he and Lunsford have been engaged in a back-and-forth over the last several weeks.

In "The Lesson" (subscription), Fischer's daughter, Mary, asks him what "change" means. "It means different things to different people," he explains, as shots of Lunsford promising "change" appear onscreen. "To Bruce Lunsford, change meant deserting the Democratic Party," Fischer charges, referring to Lunsford's decision to endorse Republican Ernie Fletcher in the 2003 race for governor after losing the Democratic primary. The ad shows footage of Senate Minority Leader Mitch McConnell, R-Ky., thanking Lunsford and calling him a "change agent," as Mary proclaims: "Ew. We need change, change we can trust."

Lunsford shot back two days later with "Trust," in which an announcer says that while Fischer "attacks Democrats for crossing party lines," he "and his family have given thousands to Republicans like George Bush and Mitch McConnell." The announcer also claims that the businesses Fischer owns "were investigated and fined by the federal government for unsafe working conditions."

Fischer responded with one of the more humorous ads we have seen this election season. In "Bruce 'The Mud Man' Lunsford" (subscription), the Fischer camp portrays the primary campaign as a wrestling match between Lunsford and "the good people of Kentucky." "In this corner we have Bruce 'Mud Man' Lunsford," an announcer proclaims as black-and-white footage of mud wrestling is shown. "He spent millions dragging Ben 'Good Guy' Chandler through the mud" in the 2003 gubernatorial race, "only to be knocked out and then endorse Republican Ernie Fletcher." The announcer then assails Lunsford for donating $60,000 to Republican candidates and denying it in a recent debate (he later apologized and said that he misspoke). "On Tuesday, stand up, Kentucky. Throw Bruce 'Mud Man' Lunsford out of the ring," the announcer concludes.

For his final TV ad, Fischer returned to a more traditional theme. "The Endorsements" (subscription) highlights kind words from the Lexington Herald-Leader and the Kentucky Standard, and adds: "The Kentucky Political Women’s Caucus, union members, veterans and hundreds of Democratic leaders and elected officials have all endorsed Greg Fischer."

Lunsford leads Fischer by 20 points in the most recent poll released by the Herald-Leader [PDF]. Both candidates trail McConnell by 12 points in head-to-heads [PDF] for the general election.