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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On March 1, 2012, Maryland's governor signed a bill into law legalizing gay marriage, but opponents gathered enough signatures to force the issue onto the ballot. Voters affirmed the law in a November 2012 state referendum, and the law went into effect on Jan. 1, 2013.