What happens next will depend less on statutes than on choices—by leaders, by courts, and by ordinary people watching uniformed troops move through civilian streets. The Insurrection Act was written for an era of horseback and muskets, yet its language still carries a terrifying modern reach. It hands the executive branch a key to unlock domestic military power, with only the vaguest constraints of “necessity” and “order” standing in the way.

If that key is turned now, it may not easily be turned back. Every future president would inherit the precedent that soldiers can be summoned into political crises as readily as into wars abroad. The true danger is not a single deployment, but a slow, quiet normalization: of troops at protests, of armored vehicles at polling places, of fear replacing consent. The question is no longer whether the law allows it, but whether a democracy can survive it.