Democracy demands that the religiously motivated translate their concerns in to universal, rather than religion-specific, values... it requires that their proposals be subject to argument and amenable to reason. Now I may be opposed to abortion for religious reasons, to take one example, but if I seek to pass a law banning the practice, I cannot simply point to the teachings of my church or evoke God's will. I have to explain why abortion violates some principle that is accessible to people of all faiths, including those with no faith at all.
I am willing to work with anybody who wants to have a serious conversation about our fiscal future. We're not going to do this under the threat of blowing up the entire economy. I will not negotiate over Congress' responsibility to pay the bills that have already been racked up. I don't know how I can be more clear about this.