It has long been the tradition of American citizens to pray for divine blessing and guidance in their civic business. This tradition, which predates the founding of the American Republic, finds expression at all levels of government, federal, state, and local. It was embraced by the First Continental Congress, the same Congress that both employed a paid chaplain and later drafted the First Amendment to the U.S. Constitution; it was maintained during the passage of the Fourteenth Amendment; and it persists in various guises to this day.
DeGirolami, Marc O., "Seeking Guidance? New Legal Challenges to 'Legislative Prayer'" (2014). Faculty Publications. 260.