Obama is an opponent, he has said he opposes Proposition 8,  you have added cites to infer something else.  Other more credible sources indicate that what the Yes on 8 campaign is saying is incorrect, Obama is not a proponent.  So why put him in that category?  Perhaps a new section on Prop 8 points and counter-points is warranted.  It would be informational to gather up all the for and against arguments and their rebuttals.