Analysis: Already in peril, Biden climate agenda faces U.S. Supreme Court test

President Joe Biden's climate-related agenda, already under threat due to congressional failure to pass key legislation, now faces the prospect of a hostile reception at the U.S. Supreme Court that could have lasting consequences on the use of federal power to tackle environmental issues.

The court's 6-3 conservative majority, suspicious of broad federal agency power, will weigh at oral arguments next Monday the Environmental Protection Agency's (EPA) authority to regulate greenhouse gas emissions from existing coal- and gas-fired power plants under the landmark Clean Air Act.

An eventual ruling restricting...