President Trump told the widow of one of the four soldiers killed in Niger this month that her husband "knew what he signed up for ... but when it happens it hurts anyway," says Rep. Frederica Wilson, D-Fla.

"Yes, he said it," Wilson said, according to ABC affiliate Local 10 News. "It's so insensitive. He should have not have said that. He shouldn't have said it," she added. Wilson said she bore witness to the call, which took place for about five minutes.

Updates: Trump says he has proof Frederica Wilson 'totally fabricated' his call with widow of soldier

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Trump made the comment to U.S. Army Sgt. La David Johnson's widow, Myeshia Johnson, who is pregnant with her late husband's third child. Trump called Myeshia Johnson just before her husband's body arrived at the Miami International Airport.

Four U.S. Army Special Forces were killed during an ambush of a joint patrol of U.S. and Nigerien forces along the Nigerien-Mali border.

Trump has politicized calling families of fallen soldiers, and claimed Monday that President Obama and other former presidents "didn't often" make calls.

The White House announced Tuesday that Trump spoke over the phone with all four of the families of the soldiers killed in Niger.