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Top Dem moments of 2012: Obama backs same-sex marriage

President Barack Obama declared his support for same-sex marriage on May 9, 2012, becoming the first sitting president ever to do so.

In this May 8, 2012 file photo, President Barack Obama speaks in Washington. President Barack Obama faced mounting pressure Wednesday to express support for same-sex marriage after a setback for gay-rights advocates in North Carolina. (AP Photo/Carolyn...
In this May 8, 2012 file photo, President Barack Obama speaks in Washington. President Barack Obama faced mounting pressure Wednesday to express support for…ASSOCIATED PRESS

MS NOW staff