In March, officials from 38 states packed into a conference hall in Cambridge, Massachusetts, for a two-day election simulation exercise that was run like a war game. More than 120 state and local election officials, communications directors, IT managers, and secretaries of state ran drills simulating security catastrophes that could happen on the worst Election Day imaginable. The tabletop exercise began each simulation months before the Nov. 6 midterm elections, accelerating the timeline until states were countering attacks in real time as voters went to the polls. Organized by the Defending Digital Democracy (D3P) project at Harvard, a bipartisan effort to protect democratic processes from cyber and information attacks, the drills forced participants to respond to one nightmare scenario after another—voting machine and voter database hacks, distributed denial of service (DDoS) attacks taking down websites, leaked misinformation about candidates, fake polling information disseminated to suppress votes, and social media campaigns coordinated by nation-state attackers to sow distrust.