A recent tweet from CNBC and New York Times contributor John Harwood seems to confirm what many observers of Donald Trump's campaign have long suspected: Trump's staff is unable to control him.

The Trump campaign has recently seen its fair share of controversies and internal shake-ups.

On Monday, Ed Brookover and Jimmy Stracner — two Trump aides who previously worked on Dr. Ben Carson's campaign staff — were fired, The New York Daily News reports.

Trump's running mate, Indiana Gov. Mike Pence was also put in an awkward position at a Monday campaign event when crowds booed a military mother for asking about Trump's ongoing controversy with a Gold Star family.

NBC News reporter Ali Vitali commented that a source within the Trump campaign confirmed Harwood's assertions in a tweet.

High profile Republicans have begun to distance themselves from Trump and even disavow him entirely.

On Monday, Former Jeb Bush advisor Sally Bradshaw announced that she was quitting the party and would vote for Hillary Clinton in her home state of Florida "if the presidential race in Florida is close." Sen. John McCain (R-Arizona), Senate Majority Leader Mitch McConnell (R-Kentucky), and House Speaker Paul Ryan (R-Wisconsin) all issued statements the same day condemning Trump's remarks about the Khan family, ABC News reports.

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Tensions between Trump and the GOP only heightened on Tuesday, when Trump said he was not ready to endorse Ryan or McCain in their respective elections, CNN reported.

Maria Comella, a former aide to New Jersey Gov. Chris Christie — one of the first of Trump's fellow Republicans to endorse him — also announced Tuesday that she would be voting for Clinton, according to The Wall Street Journal.

Former House Speaker and zoo enthusiast Newt Gingrich (R-Georgia), another one of Trump's greatest Republican allies, criticized the candidate in an interview with The Wall Street Journal.

“This is the decisive moment of defining this election,” Gingrich said. “He’s allowed himself to get dragged down into personality politics, which are to his complete disadvantage. He has to come back to elevate the race to a much bigger set of questions.”

Hewlett Packard executive and Republican fundraiser Meg Whitman declared that she will not back Trump, but instead will give a “substantial” contribution to the Clinton campaign in order to stop him from winning the election, according to The New York Times.

Former Trump campaign manager and CNN contributor Corey Lewandowski, for his part, denied the rumors.