Rep. Jim Himes James (Jim) Andres HimesMany Democrats want John Bolton's testimony, but Pelosi stays mum SEC's Clayton demurs on firing of Manhattan US attorney he would replace Democrats face tough questions with Bolton MORE (D-Conn.) on Friday expressed concern that the "adults are leaving the building" over reports that President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE's national security adviser, H.R. McMaster, may soon join the many other senior administration officials let go in recent months.

"I'll tell you what I'm concerned about, it is the fact that the adults are leaving the building," when asked if McMaster's possible departure made him nervous given current international tensions.

Trump has reportedly made the decision to fire McMaster and is currently considering replacements for the influential advisory role. The move came just days after Trump fired Secretary of State Rex Tillerson Rex Wayne TillersonGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Conspicuous by their absence from the Republican Convention MORE.

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After months of speculation that the president would replace Tillerson with CIA Director Mike Pompeo Michael (Mike) Richard PompeoUS reimposes UN sanctions on Iran amid increasing tensions Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Trump steps up Iran fight in final election stretch MORE, Trump did just that on Tuesday. He ousted Tillerson and named Pompeo as his successor while nominating CIA Deputy Director Gina Haspel to lead the spy agency.

Himes, a member of the House Intelligence Committee, said that McMaster and Tillerson were the only ones who could dissuade Trump in case he "wakes up one morning and decides it's time to go to war with country A, B or C."

"It's scary to see those guys leaving," Himes added.

Reports say Trump has not gotten along well with McMaster in the White House but respects the three-star Army general enough to take his time finding a replacement.

White House press secretary Sarah Huckabee Sanders pushed back on the reports McMasters was out saying late Thursday "there are no changes" at the National Security Council.