Associated Press
FILE – In this May 14, 2013, file photo crowd gathers at the State Capitol in St. Paul, where Minnesota Gov. Mark Dayton signed gay marriage into law. Three states and three countries have approved same-sex unions in just the two months since the Supreme Court heard arguments on gay marriage. 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/Jim Mone, File)

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