Sen. John McCain John Sidney McCainCindy McCain endorses Biden: He's only candidate 'who stands up for our values' Biden says Cindy McCain will endorse him Biden's six best bets in 2016 Trump states MORE's (R-Ariz.) wife, Cindy, on Thursday chided a White House official who mocked her husband's cancer diagnosis.

Cindy McCain responded to White House special assistant Kelly Sadler, who said the senator's opposition to 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 CIA nominee did not matter because "he’s dying anyway."

"@kellysadler45 May I remind you my husband has a family, 7 children and 5 grandchildren," McCain wrote.

@kellysadler45 May I remind you my husband has a family, 7 children and 5 grandchildren. — Cindy McCain (@cindymccain) May 10, 2018

The Hill first reported Sadler's comment, made during a internal meeting on Thursday morning for communications staffers.

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The White House did not deny Sadler made the remark, saying in a statement, "We respect Sen. McCain’s service to our nation, and he and his family are in our prayers during this difficult time."

Sadler did not respond to The Hill's request for comment, and the White House did not make her available for comment. A source later told The Hill that Sadler called the senator's daughter Meghan McCain to apologize.

Updated at 9:06 p.m.