Opponents, including trade groups and companies in the power and mining industries, were seeking to halt the rules while a legal challenge goes forward at a federal appeals court.

The U.S. Supreme Court rejected two appeals from Volkswagen AG, leaving intact rulings that let state and local governments sue over a diesel-emissions cheating scandal that already has cost the German automaker more than $23 billion.

The U.S. Supreme Court left intact President Donald Trump’s 25% tariffs on imported steel products, rejecting an industry trade group challenge that sought to strip the president of a powerful legal tool for imposing duties.

The U.S. Supreme Court refused to question President Donald Trump’s imposition of more than $4 billion in steel tariffs, turning away an appeal that challenged his use of national security as the legal justification for his trade agenda.

The U.S. Supreme Court turned away a UPS Inc. appeal that aimed to force the U.S. Postal Service to raise its prices for delivering packages.

The U.S. Supreme Court backed the rights of pregnant workers, reviving a lawsuit by a former UPS Inc. driver who had to leave her job after her doctor recommended she not lift heavy items.

The U.S. Supreme Court reversed a ruling that offered railroads the prospect of a multimillion-dollar victory in a dispute over the different fuel taxes the states impose on trains, trucks and cargo ships.