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President Trump is sticking to his guns after denying a congresswoman's claim he made an insensitive comment in a phone call with a Gold Star widow this week.

Democratic Rep. Frederica Wilson said she was with Army Sgt. La David Johnson's pregnant wife Myeshia Johnson on Tuesday when the president called to offer his condolences. The congresswoman said she heard the president say "I guess he knew what he signed up for, but I guess it still hurt."

Later she changed her account to say Trump said, "I’m sure [Johnson] knew what he was signing up for, but it still hurts."

Johnson was killed in an ambush in Niger on Oct. 4, along with three other soldiers.

Trump pushed back on Twitter and in remarks to reporters Wednesday, saying he had "proof" Wilson is lying.

"I have proof, too. This man is a sick man," Wilson said Wednesday on CNN. She said the widow told her Trump "didn't even know his name" and "broke down" after the call.

"Didn't say what that congresswoman said. Didn't say it at all. She knows it, and she now is not saying it," the president told reporters.

"I had a very nice conversation with the woman, with the wife, who sounded like a lovely woman," he continued.

Trump said he would like Wilson to make her statement again.

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