At a campaign event in Columbus, Ohio, Thursday, Hillary Clinton reacted to Donald Trump's "Look at that face!" comments about Carly Fiona and said that she has no reservations about debating Trump.

"I have to say, if he emerges, I would love to debate him," Clinton said to a crowd of hundreds at the Columbus Athenaeum.

Donald Trump said "On The Record" tonight that there is no one he would rather debate than Clinton, who he called the worst secretary of state in U.S. history.

"I think beating her in a debate would be one of the easy challenges of my life," Trump said.

Greta Van Susteren pointed out that Trump told her in 2012, "Hillary Clinton, I think, is a terrific woman ... I really like her and her husband both a lot. I think she really works hard ... I think she really works hard and I think she does a good job. I like her."

Trump explained that at the time it was his obligation as a businessman to get along well with everybody.

"I'm not going to say bad things about major politicians in this country when I'm running a major company where I need things," Trump said. "I have international trade, I have international businesses. I'm not going to go around saying bad things about people."

Watch more from "On The Record" above to hear Trump sound off on Carly Fiorina, Ben Carson and more.