John F. Kennedy said he believed in

… an America where the separation of church and state is absolute – where no Catholic prelate would tell the President (should he be Catholic) how to act … For while this year it may be a Catholic against whom the finger of suspicion is pointed, in other years it has been, and may someday be again, a Jew – or a Quaker – or a Unitarian – or a Baptist … Today I may be the victim – but tomorrow it may be youuntil the whole fabric of our harmonious society is ripped at a time of great national peril.

from a speech delivered Sept 12, 1960, to the Greater Houston Ministerial Association