Kentucky's Republican Senate nominee Rand Paul took aim at former President Bill Clinton on Monday with a broadside that harkened back to the Monica Lewinsky scandal. 

Clinton campaigned for Paul's Democratic opponent, Jack Conway, on Monday and warned voters of Paul's "radical ideas." In response, Paul brought up the scandal, which led to impeachment proceedings against Clinton. 

"I'm not sure I would trust a guy who had had sexual relations with an intern," Paul said at a campaign stop Monday, according to the Lexington Herald-Leader. "I mean, do you think he's an honorable person?

"I think that's disgusting," the Republican continued. "It gets to the point where we discount what he says."

Despite the state's conservative leanings, Clinton is a popular figure there. He won Kentucky in both 1992 and 1996. 

Clinton's stop for Conway on Monday was one of a handful of campaign appearances for Democratic candidates across the country, in which the president led the attack on Republican 2010 hopefuls. 

Clinton rallied for West Virginia Gov. Joe Manchin (D), who finds himself in a tough Senate race with Republican businessman John Raese. Clinton was also in Syracuse to campaign for Rep. Dan Maffei (D-N.Y.), who's facing Republican Ann Marie Buerkle. 

The former president also has stops upcoming for Sens. Blanche Lincoln (D-Ark.) and Michael Bennet (D-Colo.) and Rep. Kendrick Meek (D-Fla.).