Associated Press
FILE – In this May 14, 2013, file photo Minnesota Gov. Mark Dayton signs the gay marriage bill in front of the State Capitol in St. Paul. Minnesota became the 12th state to legalize gay marriage. 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. Sponsors of the bill, Sen. Scott Dibble, second from left, and Rep. Karen Clark, right, both gay lawmakers, watch. (AP Photo/Jim Mone, File)

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