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Opponent of Proposition 8, California's anti-gay marriage bill, Eddie Reynoso celebrates at Los Angeles City Hall on February 7, 2012 in Los Angeles, California. A three-judge panel of the 9th U.S. Circuit Court of Appeals ruled that the voter-approved Proposition 8 measure violates the civil rights of gay men and lesbians.

A civil war is brewing over gay marriage. 

At last count, 75 Republicans have signed on to an amicus brief supporting gay marriage. They'll submit that brief to the Supreme Court in support of the suit seeking to strike down Prop 8, California's ballot initiative that banned same-sex marriage. 

Joining us to explain what’s in the brief and who’s signed it, is New York Times’ Washington Correspondent Sheryl Gay Stolberg.