Prominent Republicans, retired military leaders and U.S. businesses are among the factions ready to ask the Supreme Court to support marriage equality in two cases up for argument next month.

The effort is being coordinated by gay rights groups and is designed to show the justices the rapid and widespread evolution of views about same-sex marriage, now legal in nine states and the District of Columbia. Religious leaders, labor groups and gay people who live in states that prohibit them from marrying are also weighing in.

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