Fired cybersecurity official Christopher Krebs is suing Trump attorney Joseph diGenova and the Trump campaign for defamation over threatening remarks diGenova made against Krebs.

Krebs hired the firms Walden Macht & Haran and Rifkin Weiner Livingston to file the lawsuit against diGenova, the Trump campaign and Newsmax, alleging they participated in a “calculated and pernicious conspiracy to defame and injure” Krebs “and Republican Party members like him—for speaking truth and conscientiously performing their public duties without servile regard to ‘party loyalty.’”