ABC News reported:

Lawyers on behalf of President Donald Trump sent a letter Wednesday night to former White House Chief Strategist Stephen Bannon demanding he refrain from making disparaging comments against the president and his family.

The letter, comes after excerpts from a forthcoming book by journalist Michael Wolff were made public Wednesday, causing a stir.

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Trump attorney Charles Harder said in a statement, “This law firm represents President Donald J. Trump and Donald J. Trump for President, Inc. On behalf of our clients, legal notice was issued today to Stephen K. Bannon, that his actions of communicating with author Michael Wolff regarding an upcoming book give rise to numerous legal claims including defamation by libel and slander, and breach of his written confidentiality and non-disparagement agreement with our clients. Legal action is imminent.”

In the letter to Bannon, Harder, writes, “You [Bannon] have breached the Agreement by, among other things, communicating with author Michael Wolff about Mr. Trump, his family members, and the Company [the campaign], disclosing Confidential Information to Mr. Wolff, and making disparaging statements and in some cases outright defamatory statements to Mr. Wolff about Mr. Trump, his family members.”

In the letter, Trump’s attorney says that “remedies for your breach of the agreement include but are not limited to monetary damages” though no dollar amount is disclosed.

Bannon has not responded to ABC News’ request for comment.