FILE - In this June 23, 2009 file photo, Keegan O'Brien of Worcester, Mass., leads chants as members of the LGBT (lesbian, gay, bisexual, transgender) community protest the Defense of Marriage Act outside a Democratic National Committee fundraiser in Boston. A battle over the federal law that defines marriage as a union between a man and a woman appears headed for the Supreme Court after an appeals court ruled Thursday, May 31, 2012, that denying benefits to married gay couples is unconstitutional. (AP Photo/Elise Amendola, File)