Hillary Clinton's campaign logo was changed Tuesday to show support for same-sex marriage on the day of oral arguments at the Supreme Court. Hillary Clinton campaign hide caption

itoggle caption Hillary Clinton campaign

The stack of amicus briefs filed as of April 9 reached past the knee of NPR legal affairs intern Anthony Palmer. The briefs cost, on average, an estimated $25,000 to $50,000. Emily Jan/NPR hide caption

itoggle caption Emily Jan/NPR

Former Secretary of State Hillary Clinton speaks at the Clinton foundation's Clinton Global Initiative conference with her husband, Bill, and daughter, Chelsea, looking on. Michael Loccisano/Getty Images hide caption

itoggle caption Michael Loccisano/Getty Images

Chief Justice John Roberts (from left) and Justices Anthony M. Kennedy, Ruth Bader Ginsburg, Stephen G. Breyer and Sonia Sotomayor at the State of the Union address earlier this year. Mandel Ngan/AP hide caption

itoggle caption Mandel Ngan/AP