Associated Press
FILE - In this May 2, 2013, file photo two men embrace after a gay marriage was signed into law outside the State House in Providence, R.I. Three states and three countries have approved same-sex unions in just the two months since the Supreme Court heard arguments on the issue. Close observers on both sides of the divide are wondering whether such developments might affect the justices' consideration, particularly that of Justice Anthony Kennedy, which is likely to be decisive. (AP Photo/Charles Krupa, File)

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