The Pentagon had “ample support for its conclusion” that the A.I. company’s products could pose a national security risk, according to a Washington appeals court.

© Manuel Orbegozo for The New York Times

The 64-year-old Michigan power plant was set to retire. Then the Trump administration intervened in a way that overstepped its authority, a court ruled.

© Julián Trejo Bax/Associated Press

The outcome contradicted an earlier appeals court decision. Federal regulators said the split rulings called for resolution by the Supreme Court.

© Eric Helgas for The New York Times