The Supreme Court is expected to issue rulings on two same-sex marriage cases this month, including one dealing with California's Proposition 8, which makes same-sex marriage unconstitutional in the state. Take a look at the path same-sex marriage has taken in states across the country.
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In Washington, the governor signed a bill allowing gay marriage on Feb. 13, 2012. Opponents got enough signatures for a referendum vote, and the law only went into effect on Dec. 6, 2012, after voters approved the measure.