POLITICO reported Monday that President Donald Trump was "very pissed off" about Cliff Sims' tell-all book. | Alex Wong/Getty Images White House Trump: Tell-all author Cliff Sims 'is a mess' The president's reelection campaign also says it's planning to file a lawsuit against Sims.

President Donald Trump on Tuesday bashed former White House aide Cliff Sims for his tell-all book on the West Wing's chaos and rampant infighting and the president's strained relationship with Republican leaders.

"A low level staffer that I hardly knew named Cliff Sims wrote yet another boring book based on made up stories and fiction," Trump tweeted. "He pretended to be an insider when in fact he was nothing more than a gofer. He signed a non-disclosure agreement. He is a mess!"


The book, “Team of Vipers: My 500 Extraordinary Days in the Trump White House,” came out Tuesday. Excerpts of the book showcase top White House aides' irritation with the president and reveal embarrassing anecdotes from within the White House.

Sims, who left the White House last May, worked on Trump's 2016 campaign and has joined a growing list of former White House aides and insiders who have written books about their time in Trump's orbit.

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POLITICO reported Monday that Trump was "very pissed off" about the book and that aides wondered whether Sims were subject to legal action because he had reportedly signed a nondisclosure agreement.

Michael Glassner, chief operating officer for Trump's reelection campaign, tweeted that the campaign "is preparing to file suit against Cliff Sims for violating our NDA."

The campaign last year also filed an arbitration claim against former White House aide Omarosa Manigault Newman for her own tell-all book, "Unhinged," in which she claims Trump used racial epithets and is a “racist, misogynist and bigot.”

It's unclear whether the nondisclosure agreements are enforceable.