Supreme Court cases

The climate legacy of Justice Stevens

Retired Supreme Court Justice John Paul Stevens testifies before a Senate panel in 2014. Photo: Allison Shelley/Getty Images

Retired Supreme Court Justice John Paul Stevens, who died yesterday at age 99, wrote the landmark 5-4 decision in 2007 that clearly gave EPA the power to regulate GHG emissions.

Why it matters: EPA began acting on that authority during the Obama years. Major rules include emissions standards for cars and power plants, which the Trump administration is weakening.

Judges wary of Affordable Care Act mandate

Protesters rally against the Affordable Care Act outside the Supreme Court in 2012
Anti-Affordable Care Act protesters in 2012. Photo: Brooks Kraft LLC/Corbis via Getty Images

A federal appeals court seemed likely on Tuesday to strike down what remains of the Affordable Care Act's individual mandate, but sent more mixed signals about its willingness to throw out the rest of the health care law along with it.

Why it matters: If a ruling striking down ACA comes to pass — like the one a lower court handed down last year — it would throw some 20 million people off their coverage, create ripple effects through almost every facet of the health care system and ignite an enormous political firestorm.