Robert Reich, former Secretary of Labor in the Clinton Administration, has an article in the December American Prospect on how the gay marriage issue could be something the Democrats could use against the Republicans:
The religious wars aren’t pretty. Religious wars never are. But Democrats should mount a firm and clear counter-assault. In the months leading up to Election Day, when Republicans are screaming about God and accusing the Democrats of siding with sexual deviants and baby killers, Democrats should remind Americans that however important religion is to our spiritual lives, there is no room for liberty in a theocracy.