In Obergefell v. Hodges, the court must decide if the United States Constitution requires states to perform same-sex marriages and, if not, whether it requires states to recognize those marriages performed elsewhere. See Professor Boonin's piece at the Huffington Post http://www.huffingtonpost.com/sarah-r-boonin/dear-supreme-court-our-daughter-is-watching_b_7658716.html