Washington (CNN) Sen. Amy Klobuchar argued Wednesday that there's a "double standard" for women in politics, but says she expects to win the 2020 Democratic nomination because she's "the best person for the job."

During the CNN/Des Moines Register debate at Drake University Tuesday night, gender in politics became a focus amid a campaign feud between Sens. Bernie Sanders and Elizabeth Warren. Warren said Monday that during a 2018 meeting between the two, Sanders told Warren that a woman couldn't win the election.

Sanders has denied he made the remark, and Warren charged that a woman can beat President Donald Trump. She added that she and Klobuchar were the only candidates on the debate stage who have won all their elections -- and are the only women.

"When we had that gender discussion last night, one of the things I wanted to add to it -- and I'm the one for months now that's been saying, 'Yeah, there's a double standard for women in politics, but I'll make it' -- one of the things I wanted to add is that you want to have someone that can win. Man or woman," Klobuchar told CNN's John Berman on "New Day," adding, "I bring people with me. I don't shut them out."

Asked about touting her winning record, Klobuchar said, "I've got receipts."

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