Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE Jr. on Friday shared a Drudge Report tweet that he said was "confirmation" that the "Deep State is real."

"If there was ever confirmation that the Deep State is real, illegal & endangers national security, it's this. Their interests above all else," Trump Jr. tweeted alongside an article by Free Beacon that claims the Trump administration faces a national security leak every day.

If there was ever confirmation that the Deep State is real, illegal & endangers national security, it's this. Their interests above all else https://t.co/TdQT2NxErx — Donald Trump Jr. (@DonaldJTrumpJr) July 7, 2017

The deep state refers to a conspiracy theory embraced by some on the left and right, holding that bureaucrats, intelligence officials and other government figures are attempting to manipulate the country, especially with leaks of information within the Trump administration.

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Trump supporters have been critical of leaks to the press, especially leaks of intelligence information. Many close Trump allies have also supported the deep state theory.

White House Press Secretary Sean Spicer in March conceded there may be a network of federal government employees resisting Trump — the "deep state."

“Does the White House believe there’s such a thing as the deep state that’s actively working to undermine the president?” a reporter asked during Spicer’s daily press briefing.

"I think that there's no question when you have eight years of one party in office, there are people who stay in government - and continue to espouse the agenda of the previous administration," Spicer said.

Trump's former campaign manager, Corey Lewandowski, also previously accused former FBI Director James Comey of being part of the "deep state," saying he has tried to "manipulate the media" against Trump.

"What we've seen from Jim Comey is his goal is to manipulate the media, manipulate the press," Lewandowski said on NBC's "Today" show. "He is part of the deep state. He's everything that's wrong in Washington."