Former White House official Omarosa Manigault Newman portrayed herself Monday as part of the anti-Trump “resistance” movement and will spend the midterm-election season laying out her case against supporting the president.

Ms. Manigault Newman, in an interview with the Wall Street Journal, said she isn’t intimidated by legal actions taken by the president’s campaign as she promotes a new tell-all book about her White House stint: “Unhinged.”