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Supreme Court Hears EPA Challenge, Nikki Haley Remains Defiant, Frozen Embryo Ruling

The Supreme Court today hears a challenge to the EPA's authority to regulate air quality. Three GOP-led states want the court to freeze a plan that limits air pollution that crosses state borders. Former South Carolina Governor Nikki Haley has vowed to stay in the presidential race through Super Tuesday. But Saturday's primary in her home state is shaping up to be another decisive victory for former President Donald Trump. What's her case for staying in the race? And Alabama's Supreme Court rules that fertilized eggs have the same rights as children. Want more comprehensive analysis of the most important news of the day, plus a little fun? <a href="https://www.npr.org/newsletter/news">Subscribe</a> to the Up First newsletter. Today's episode of Up First was edited by Krishnadev Calamur, Padma Rama, Susanna Capelouto and HJ Mai. It was produced by Claire Murashima, Ben Abrams and Milton Guevara. We get engineering support from Robert Rodriguez, and our technical director is Neisha Heinis. Learn more about sponsor message choices: <a href="https://podcastchoices.com/adchoices">podcastchoices.com/adchoices</a> <a href="https://www.npr.org/about-npr/179878450/privacy-policy">NPR Privacy Policy</a>

NPR's Up First is the news you need to start your day. The three biggest stories of the day, with reporting and analysis from NPR News — in 10 minutes. Available weekdays at 6:30 a.m. ET, with hosts Leila Fadel, Steve Inskeep, Michel Martin and A Martinez. Also available on Saturdays at 9 a.m. ET, with Ayesha Rascoe and Scott Simon. On Sundays, hear a longer exploration behind the headlines with Ayesha Rascoe on "The Sunday Story," available by 8 a.m. ET. Subscribe and listen, then support your local NPR station at donate.npr.org. Support NPR's reporting by subscribing to Up First+ and unlock sponsor-free listening. Learn more at plus.npr.org/upfirst