Associated Press
This video framegrab, provided by the Human Rights Campaign shows former Secretary of State Hillary Rodham Clinton announcing her support for gay marriage. Knowing someone who is gay or just getting older and thinking about the issue are two big reasons the country is viewing same-sex marriage more favorably, according to a national survey. The Pew Research Center poll helps explain why Americans seem to be changing their minds on the issue and follows the recent public embrace of gay marriage by Clinton and Republican Sen. Rob Portman. (AP Photo/Human Rights Campaign)

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