By Jen Christensen, CNN
(CNN) - After President Obama announced his support for same-sex marriage, a group organizing a fundraiser on his behalf suddenly had to find a bigger venue. The event, featuring the pop singer Pink, is one of two LGBT-organized fundraisers Obama is expected to attend on the West Coast on Wednesday.
A CNN analysis of President Obama's biggest fundraisers, known as bundlers, shows that at least 33 - or about one in every 16 bundlers - is openly gay. Together, they have raised at least $8 million for the campaign between January and the end of March.
By contrast, in the same period, bundlers from the television, movie and music industry, some of whom attended a recent high-profile fundraiser hosted by actor George Clooney, raised $6.8 million, according to the Center for Responsive Politics.