Federal State Conflicts

FERC regulates wholesale electricity markets. States regulate retail rates and generation choices. The boundary between wholesale and retail has become the most contested jurisdictional line in US energy law, because state clean energy policies increasingly affect wholesale market outcomes that FERC controls.

The core tension. When a state subsidizes a nuclear plant (Illinois Zero Emission Credits) or mandates renewable procurement (state RPS), it injects below-market-price generation into FERC-jurisdictional wholesale markets. This depresses wholesale prices, which can make unsubsidized generators uneconomic. FERC's response (the Minimum Offer Price Rule, or MOPR) attempted to prevent subsidized resources from suppressing capacity market prices. States viewed MOPR as federal interference with their right to choose their own generation mix.

The legal battlefield. In Hughes v. Talen Energy (2016), the Supreme Court struck down Maryland's attempt to guarantee revenue to a new gas plant through wholesale market participation, ruling it invaded FERC's wholesale jurisdiction. But in Virginia Uranium v. Warren (2019), the Court affirmed broad state authority over energy choices. The line between permissible state policy and impermissible wholesale market interference remains unclear.

Can states pursue clean energy goals without conflicting with federal wholesale market rules?

Only if FERC accommodates state policy. FERC's 2021 decision to largely abandon MOPR in PJM signaled a shift toward accepting state-subsidized resources in wholesale markets. But the underlying tension persists: every state subsidy affects wholesale prices, and every wholesale market rule constrains state choices. The jurisdictional boundary is inherently unstable.

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