The fact that we have to choose a specifically religious occasion and location in the case of the American text is in itself significant. True, American political rhetoric does include religious language, and religious speech acts.
When speaking of history of American politics, it is easy to digress into the field of religion. Christianity has a given place as the normative faith in many politicians’ speeches, although some politicians never forget to mention that U.S.A. is a nation of many different religions (leaving out some minorities, while including others).
Nearly all the speeches of American presidents show that their language can easily be associated with the Christian faith.