Nikki Haley is resigning as the U.S. ambassador to the United Nations and will leave the Trump administration at the end of the year. Plus, the Supreme Court welcomes its newest justice as Brett Kavanaugh takes the bench for his first arguments since a contentious Senate voted narrowly to confirm him. This episode: White House correspondent Tamara Keith, national political correspondent Mara Liasson, White House reporter Ayesha Rascoe, and justice correspondent Carrie Johnson. Email the show at nprpolitics@npr.org. Find and support your local public radio station at npr.org/stations.