Disgusted by Jan. 6, John Williams set out on a two-year undercover operation. The one person he told was a ProPublica reporter.

Rounding up migrants. Lists of “friendly” sheriffs. Debating political assassinations. Internal messages reveal AP3’s journey from Jan. 6 through the tumultuous lead-up to the 2024 election. One member predicts: “It’ll be decided at the ammo box.”