Donald Lewis, a lawyer involved in dueling litigation with his former colleagues at Pierce Bainbridge Beck Price & Hecht, has sued the firm again, claiming $75 million in damages for allegedly defaming him in court papers and public statements.

Amid the escalating litigation, Pierce Bainbridge has retained Marc Mukasey, the former Greenberg Traurig shareholder who started his own boutique earlier this year and who represents President Donald Trump in some court matters. In a statement to ALM on Friday, Mukasey called it “an honor to represent” the firm and its partners in their litigation against Lewis.