A federal judge in Oregon orders the Trump administration to change hydropower operations on the Columbia and Snake Rivers to protect endangered salmon populations, siding with scientific evidence over the administration's power reliability concerns and reversing its withdrawal from a billion-dollar salmon recovery agreement. The ruling addresses a decades-long ecological crisis in which seven of sixteen salmon and steelhead stocks in the basin are now endangered and four have gone completely extinct, prompting a collision of environmental protection, energy policy, and tribal treaty rights. The decision represents a significant rebuke of the administration's legal arguments and reinstates emergency stabilization measures that could reshape regional power generation and water management.