When Brandi Levy was 14, she posted an expletive-filled video to Snapchat, expressing her dismay at not making the varsity cheerleading squad. It got her suspended from cheerleading entirely for a year. Can a public school deal with off-campus speech in this way without infringing the First Amendment? The Supreme Court will decide. Guest: Adam Liptak, a reporter covering the United States Supreme Court for The New York Times.