The Washington Post on the money behind the morph:

The controversy that has erupted this week over President Obama's stance on same-sex marriage has cast a spotlight on the importance of the gay community to his re-election fundraising efforts.

Many of Obama’s key financial supporters are gay, including finance director Rufus Gifford and Democratic National Committe treasurer Andrew Tobias, and the campaign has held a steady series of fundraisers focused on lesbian, gay, bisexual and transgender donors.

A review of Obama’s top bundlers--those who have brought in $500,000 or more for the campaign--shows that about one in six publicly identify themselves as gay. His overall list of bundlers also includes a number of gay couples who have wed in jurisdictions where same-sex marriage was legal.