S.4214 Sanders Mar 25 2026 / H.R.9442 AOC Jun 24 2026 / Carson IN-07 co-sponsor / freeze construction expansion any facility >20 MW AI at scale / rack density ≥20 kW / liquid or immersion cooling / until Congress passes safeguards on energy costs environmental harm job displacement privacy civil rights / requires local approval / no path to passage current Congress / defines political ceiling for federal action / anchors 20 MW threshold across state bills / NVIDIA Blackwell Rubin 100+ kW rack essentially captured / 15-25% probability federal regulation this threshold by 2029

Plain-English background on why a bill with no path to passage still matters strategically. The federal AI Data Center Moratorium Act (S.4214 Senate, H.R.9442 House) is unlikely to pass a Republican-controlled Congress. Sanders is an Independent caucusing with Democrats; Ocasio-Cortez is a House Democrat; Carson is a Democrat from Indiana's 7th district. There is no Republican co-sponsor. The bill has not moved out of committee in either chamber. It will not become law in this session. But it matters for three specific structural reasons. First, it defines the political ceiling for federal action — the maximum-aggressive Democratic-side proposal on data center regulation. That means every future federal proposal from the Democratic side will be measured relative to this bill; every future federal compromise or bipartisan bill will start from a position weaker than this one. Second, it establishes a specific quantitative threshold — 20 MW facility size, 20 kW rack density, liquid or immersion cooling — as the Democratic-side reference point for what constitutes 'AI at scale.' Third, it demonstrates alignment across the state and federal levels: New York A11560 uses 20 MW as the threshold; the federal bill uses 20 MW; the New Mexico statewide proposal is expected to use a similar or lower threshold. Cliff should treat 20 MW as the political floor for any state-level moratorium threshold decision from the Democratic side. What the bill actually says. The bill defines an 'AI data center' as a facility on a single site or connected sites under common ownership that either (a) is used for artificial intelligence at scale, or (b) exceeds 20 megawatts of demand AND is built to deliver at least 20 kilowatts to a single server rack OR uses advanced liquid cooling or immersion cooling systems. Any facility meeting either criterion cannot be constructed or expanded until Congress passes 'strong national safeguards' covering: energy costs for consumers, environmental harm, job displacement, privacy rights, and civil rights. The bill also requires local approval for any new facility even after national safeguards are enacted — meaning federal preemption of local decisions is explicitly rejected. Why the 'liquid or immersion cooling' clause is analytically interesting. Advanced liquid cooling and immersion cooling are the primary technical response to rising rack densities in AI training and inference workloads. NVIDIA's Blackwell / Rubin generation of GPUs at 100+ kW per rack essentially require liquid or immersion cooling. So the federal bill's definition of an 'AI data center' captures precisely the facility architecture that hyperscalers are moving toward — even a facility that doesn't announce itself as 'AI' but adopts liquid cooling would be captured. That's a broader definition than most state moratoriums, which typically use MW threshold alone. How this affects hyperscaler policy strategy. Every hyperscaler regulatory affairs team now has to model two federal-side scenarios: (1) probability the federal bill moves — currently low, but any change in Congress composition changes this probability; (2) probability the 20 MW / 20 kW / liquid-cooled threshold becomes the anchor point for future bipartisan federal legislation. That anchor-point risk is real even if the bill itself doesn't pass. Hyperscalers should factor a 15-25% probability of eventual federal regulation using approximately this threshold structure by 2029, up from near-zero probability in 2024. Additional political dimension: Rep Andre Carson (D-IN-07) joining the bill is meaningful because Indiana is a heavily-solicited data center state and Carson represents Indianapolis, which has its own SU-47 data center zoning ordinance moving through the City-County Council (introduced Monday July 6, public hearing Jul 13, possible final vote Aug 10). Carson's federal co-sponsorship pairs with local Indianapolis action — that's the alignment Cliff should watch for in other Democratic-district data center hotspots.

Primary source · Congress.gov S.4214 — Artificial Intelligence Data Center Moratorium Act + Congress.gov H.R.9442 — Artificial Intelligence Data Center Moratorium Act + Sen. Bernie Sanders Press Release — Sanders Ocasio-Cortez Announce AI Data Center Moratorium Act + Rep. Ocasio-Cortez Press Release — Ocasio-Cortez Introduces House Version of the AI Data Center Moratorium Act + Rep. Andre Carson Press Release — Carson Introduces Data Center Moratorium Bill + Section by Section: Artificial Intelligence Data Center Moratorium Act + Data Center Dynamics — Ocasio-Cortez and Sanders introduce AI Data Center Moratorium Act ↗