Sen. Claire McCaskill Claire Conner McCaskillMomentum growing among Republicans for Supreme Court vote before Election Day Democratic-linked group runs ads in Kansas GOP Senate primary Trump mocked for low attendance at rally MORE (D-Mo.) said in an interview on Sunday that former Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE needs to be more careful in how she describes President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's voters.

"For those of us that are in states that Trump won, we would really appreciate if she would be more careful and show respect to every American voter and not just the ones who voted for her," McCaskill told MSNBC's Kasie Hunt.

"I understand the point she was trying to make, but it felt like she was criticizing Missouri voters," she said.

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"I would draw a line there. I have great respect for Missouri voters, and there were a lot reasons why they voted for Donald Trump, some of them I understand," she said.

Trump won McCaskill's home state of Missouri in the 2016 presidential election.

Clinton faced backlash earlier this month after she described areas that voted for Trump during a recent address in India.

"If you look at the map of the United States, there's all that red in the middle where Trump won," Clinton said. "I won the places that are optimistic, diverse, dynamic, moving forward. And his whole campaign, ‘Make America Great Again,’ was looking backwards," she continued.

"You didn’t like black people getting rights, you don’t like women, you know, getting jobs. You don’t want, you know, to see that Indian-American succeeding more than you are. Whatever your problem is ... working for a woman now, you don't like it. Whatever the reason was, he stirred that up."

McCaskill's potential Republican 2018 challenger seized on Clinton's remarks and tied them to McCaskill and her support of Clinton in a recent campaign ad.

"In Claire McCaskill's America, Hillary is the president. Sen. McCaskill led the Hillary coalition. And what does Hillary Clinton think about us?" the ad says, before playing Clinton's remarks.

McCaskill also spoke out against Clinton's remarks earlier this month.