Religion as a Political Weapon

As made example by Mitt Romney, religion is important to any party or candidate platform. However, once in the White House, it is important to elect a candidate who will first, respect the ideals and beliefs of his own religion, and second, not let his personal insight into the religion affect executive decisions or control the decisions which he makes. It is important that any President uses his religion to judge what is morally and ethically correct, but he at the same time must take into consideration what America as a whole believes is morally and ethically correct. A fine line must be drawn. For example, Stem Cell Research. Bush claimed that he would veto any bill surrounding this topic. While some states have started their own research, Bush's reasons for his veto are obvious: it's not a moral belief that follows his religion. So the question is, will the next president be able to balance religion and politics in the White House?