A divided US Supreme Court threw out a decades-old legal doctrine that empowered federal regulators to interpret unclear laws, issuing a blockbuster ruling that will constrain environmental, consumer and financial-watchdog agencies.
The 6-3 decision, which came in a fight over a fishing-industry regulation, is a long-sought triumph for opponents of big government. The court overturned Chevron v. Natural Resources Defense Council, a 1984 ruling