I received this letter from the American Civil Liberties Union, addressed to Mr. Trump. As America’s anti-democratic turn imperils the free world, the ACLU will be a crucial defender.

The letter tells Trump that if he targets immigrants, dissidents, and political opponents, they will challenge him. They will do so in courts, state legislatures, and on the streets. They also note that there are more than one million card-carrying ACLU members. They’ve developed a comprehensive roadmap to defend our rights since day one of his second presidency. Also, they’ve been around for about 105 years and seen 19 presidents come and go. They warn Trump that any effort to roll back the nation’s civil liberties will be hard-fought. It will be met with the full power of the ACLU’s resistance.