I would like to present US religious diplomacy since 1998, the year in which the American Congress passed the International Religious Freedom Act. This US Federal Law intended to improve the general state of religious freedom in the world, country by country, thanks to specific pressure from the American diplomacy. If we leave aside that question able claim to “monitor” how religious freedom is respected in foreign countries, some other questions remain open: Has this Law produced concrete results over the years? How successfully? How did the successive presidencies handle the diplomatic obligations included in the Law? Did they follow them, ignore them or combine them with their own international “religious” policy?