Behavior Standards for Elected Representatives

I googled, with as many key words as I could muster, to determine if there were standards of behavior for elected representatives. I found only two. An elected representative should (1)serve the common or public good, and (2)not use public office for a private purpose. If an elected representative attempts to further his or her religious beliefs, i.e. downplay evolution, stifle sex education, ban stem cell research, etc. does he or she serve the greater common or public good. This is a question of ethics. Does legislation or policies that further religious beliefs serve the greater good? Our national and state constitutions guarantee religious freedom, making religion a private matter for each individual. Does legislation or policies that promote a private purpose, i.e., furtherance of an individual's religious beliefs, constitute unacceptable behavior? The answers for both questions are obvious. Elected representatives from the Christian right should be evaluated by standards of behavior. If they are found lacking, they should be impeached or recalled.