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Secretary of Education Arne Duncan said on Monday that he supports same-sex marriage, the second Obama administration official to come out in favor of the policy in as many days.

A day after Vice President Joe Biden said that he was "absolutely comfortable" with same-sex marriage in a wide-ranging interview on NBC's Meet the Press, Duncan gave a simple, "Yes, I do," when asked on MSNBC's Morning Joe.

Duncan did not elaborate, other than to say that he was unsure if he had ever been asked the question publicly before.

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