Organizing for Action, which grew out of the president's reelection campaign, is working to generate support for the cause in Illinois.
The influential group said it released the policy change so that the Supreme Court justices would be able to consider it.
The Supreme Court will soon consider the constitutionality of Proposition 8 in California and the Defense of Marriage Act nationwide.
Katie Herzig supports marriage equality, and ordered that an antigay video from NOM using her song be removed.
Progressive columnists are taking The Washington Post's George Will to task for a recent op-ed where he argued that the Supreme Court should reject marriage equality because there has not been enough research on its "consequences."