Mr. Sims was a White House aide from the beginning of the administration. But it was the campaign organization that filed an arbitration claim against him last week, accusing him of violating the nondisclosure agreement he signed with it during the 2016 presidential race with the publication of his book, “Team of Vipers,” last month.
The White House had dozens of people sign such agreements at the beginning of the president’s term. But those agreements are widely seen as likely unenforceable. In the suit, Mr. Sims says he does not recall whether he signed one when he came to the White House.
Mr. Sims’s lawsuit alleges that Mr. Trump “is seeking to impose civil liability against Mr. Sims through application of NDAs that apply to information Mr. Sims learned solely during his federal service.”