Democratic Rep. Ted Lieu (Calif.) chided White House press secretary Sarah Huckabee Sanders on Saturday, arguing that leaks from White House staff might stop if officials behaved "normally."

Lieu, one of 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 most vocal critics in Congress, offered the mocking advice after Sanders reportedly scolded her staff for allowing the leak of a derisive comment about 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 (R-Ariz.) this week.

"One way to prevent leaks is if Administration officials stopped saying demeaning things, stopped wasting taxpayer funds, and started behaving normally. Then the leaks wouldn't be of interest to the American people. Get it?" Lieu tweeted.

Dear @PressSec: One way to prevent leaks is if Administration officials stopped saying demeaning things, stopped wasting taxpayer funds, and started behaving normally. Then the leaks wouldn't be of interest to the American people. Get it? https://t.co/5LZMETpvsN — Ted Lieu (@tedlieu) May 12, 2018

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The Hill first reported Thursday that White House aide Kelly Sadler said in a private meeting that McCain's vocal opposition to the confirmation of Trump's nominee for CIA director, Gina Haspel, "doesn't matter" because "he's dying anyway."

McCain, 81, is in Arizona battling an aggressive form of brain cancer, with members of his family panning the White House aide's comment on Friday.

While Sanders apparently characterized the comment as "unacceptable," she was reported to have been more upset that the comment leaked in the first place.

White House budget chief Mick Mulvaney Mick MulvaneyMick Mulvaney to start hedge fund Fauci says positive White House task force reports don't always match what he hears on the ground Bottom line MORE similarly dismissed the aide's comment as a "bad joke" on Saturday but argued during a Fox News appearance that the bigger issue was that the remark had been leaked.

"The leak was designed to hurt that person. Also, it completely ignored the harm it would do to the McCain family, which is doubly inconsiderate," Mulvaney said.

Various lawmakers and political figures including former Vice President Joe Biden Joe BidenOmar fires back at Trump over rally remarks: 'This is my country' Trump mocks Biden appearance, mask use ahead of first debate Trump attacks Omar for criticizing US: 'How did you do where you came from?' MORE, a longtime friend of McCain, have condemned the comments.

The White House has not indicated it will fire Sadler or issue a formal apology.