ONW continues to miss the point. She isn't saying that God is going to write the answer on the ground in a giant lightning strike. She is asking for guidance. As someone who has prayed that same prayer sometimes that guidance comes from an advisor, sometimes from someone you least expect, sometimes it comes from a door closing that you would like to walk through. The point isn't that God is going to write the answer on your fogged mirror. The point is that you are recognizing that there is a being that is wiser than you, that sees the entire quilt while you just stare at a mess of threads.
This doesn't mean that you cease to use your mental faculties, your education, your advisors, your confidants when making a decision. What this means is that you recognize first and foremost that God Almighty does exist, and that He is in control, not you. For anyone who doesn't believe in God this is a pretty awful statement, but our country clearly allows for freedom of religion, so to condemn someone exercising that freedom of religion while doing his/her job is shallow and shortsighted.
The opposite (and equally ludicrous) to your point of view is that a Christian society would REQUIRE you, as an atheist, to pray to God before every decision. If you didn't then you weren't fit for office. The idea of prohibiting someone from praying who truly believes in an Almighty God is the equivalent of choking someone who believes he needs to breath. There isn't any room inbetween. If there is a God, then it is suicide not to have an open line of communication with that God (which is clearly what the Bible is proposing).
ONW - you continue to ignore the fact that you are over simplifying the process of prayer. You have this idea that if someone prays for guidance they automatically lose all other mental faculties. The Bible never demands that...in fact it is quite the opposite.