Early reports say that President Obama has made his choice for the U.S. Supreme Court. The pick to fill retiring Justice Souter's seat appears to be Sonia Sotomayor. She has been a judge of the United States Court of Appeals for the Second Circuit since 1998. Before joining the appeals court, she served as a United States District Court judge for the Southern District of New York. The Takeaway turns to Columbia Law Professor Nate Persily for more.