In June, the US Supreme Court overturned a 40-yearold legal principle known as the Chevron doctrine, which deferred to federal agencies on how regulations are interpreted in legal cases when the legislation enacted by Congress is unclear. Striking a blow … In June, the US Supreme Court overturned a 40-yearold legal principle known as the Chevron doctrine, which deferred to federal agencies on how regulations are interpreted in legal cases when the legislation enacted by Congress is unclear. Striking a blow … Science