Retiring Sen. Tom Harkin (D-Ia.) raised some eyebrows over the weekend, cautioning voters not to be fooled by State Sen. Joni Ernst (R), saying she's "really attractive" and "sounds nice." 

“In this Senate race, I’ve been watching some of these ads. And there’s sort of this sense that, ‘Well, I hear so much about Joni Ernst. She is really attractive, and she sounds nice. Well I got to thinking about that. I don’t care if she’s as good looking as Taylor Swift or as nice as Mr. Rogers, but if she votes like Michele Bachmann, she’s wrong for the state of Iowa," Harkin said.

Ernst leads U.S. Rep. Bruce Braley (D-Ia.), by seven points in the latest Des Moines Register poll to fill Harkin's Senate seat.

The contest is seen as crucial to Republicans' chances of winning a Senate majority.

Ernst responded to the remark on "Fox and Friends" this morning, saying she was "greatly offended" by what he said.

She said Harkin and many Democrats seem to feel that you "really can't be a real woman if you're conservative and you're female."

Ernst was asked how the remark would be covered if a Republican man had said something like that about a female Democratic candidate.

"I think the press would have been all over this. They would not have let that go. If my name had been John Ernst attached to my resume, Senator Harkin would not have said those things," said Ernst.

The military veteran then pushed back on the notion that the GOP is pushing a "war on women."

"First, I am a woman and second, I have been to war. I am a combat veteran and this is not a war on women. And any time Democrats are using the word 'war' they need to do it to honor our service men and women," said Ernst, adding that the first thing she wants to do if she wins the election is to look at ways to "repeal, then replace ObamaCare."

Watch the full interview above, and tune in tomorrow night at 6p ET for live coverage of the midterm election with Bret Baier and Megyn Kelly.