Every AI headline about a new model or a new data center campus is secretly an energy story. Training and running large models requires enormous, always-on electricity — a single hyperscale AI campus can draw as much power as a mid-sized city — and the U.S. grid was not built for this kind of demand growth. For the first time in nearly two decades, utility planners are revising load forecasts sharply upward, and the constraint on AI buildout is shifting from chips to megawatts.

That shift makes Washington newly relevant to a sector investors used to think of as boring. Federal Energy Regulatory Commission (FERC) rules on transmission interconnection, Department of Energy loan guarantees and permitting reform for nuclear and gas, state public utility commission rate cases, and even tariff policy on grid components (transformers, steel, solar panels) now directly determine who can build power fast enough to capture AI demand — and who gets left waiting in an interconnection queue that in some regions stretches past 2030.

This guide is a durable reference for that mechanism: how policy decisions translate into which companies profit from the buildout, which real tickers sit in the crosshairs, and how to keep tabs on the story as it evolves over years, not news cycles.