The Constitution of the U.S. forbids everything like an establishment of a national religion.
James MadisonThere is one view of the subject which ought to have its influence on those who espouse doctrines which strike at the authoritative origin and efficacious operation of the Government of the United States. The Government of the U.S. like all Governments free in their principles, rests on compact; a compact, not between the Government & the parties who formed & live under it; but among the parties themselves, and the strongest of Governments are those in which the compacts were most fairly formed and most faithfully executed.
James MadisonBecause finally, 'the equal right of every citizen to the free exercise of his religion according to the dictates of conscience' is held by the same tenure with all his other rights. If we recur to its origin, it is equally the gift of nature; if we weigh its importance, it cannot be less dear to us; if we consider the 'Declaration of those rights which pertain to the good people of Virginia, as the basis and foundation of government,' it is enumerated with equal solemnity, or rather studied emphasis.
James MadisonConscience is the most sacred of all property; other property depending in part on positive law, the exercise of that, being a natural and unalienable right.
James Madison