I've seen assertions he supported the DOMA, but he didn't vote for it, so he couldn't have supported it very much.
http://clerk.house.gov/evs/1996/roll316.xmlFurther, he supports human rights in virtually every context, including marriage.
Paul wants the government out of the marriage business. Obama wants the government in the marriage business, AND he wants to keep gay marriage banned.
Thus if support of DOMA is your criteria, then Paul is a better choice than Obama.
Of course this has nothing to do with SOPA. It's just the leftist talking points for bashing Paul whenever his name comes up so we have to respond to these insinuations.