One argument given in support of the USA being a Christian Nation is that the pilgrims, coming to the new world to establish a new colony, sought to install some sort of Christian government over the land. The intent was to have a Christian nation.
Here’s the text of the 1620 Mayflower Compact as we have received it from William Bradford:
In ye name of God Amen. We whose names are vnderwriten, the loyall subjects of our dread soueraigne Lord King James by ye grace of God, of great Britaine, franc, & Ireland king, defender of ye faith, &c
Haueing vndertaken, for ye glorie of God, and aduancemente of ye christian faith and honour of our king & countrie, a voyage to plant ye first colonie in ye Northerne parts of Virginia doe by these presents solemnly & mutualy in ye presence of God, and one of another, couenant, & combine our selues togeather into a ciuill body politick; for ye our better ordering, & preseruation & furtherance of ye ends aforesaid; and by vertue hearof, to enacte, constitute, and frame shuch just & equall lawes, ordinances, Acts, constitutions, & offices, from time to time, as shall be thought most meete & conuenient for ye generall good of ye colonie: vnto which we promise all due submission and obedience. In witnes wherof we haue herevnder subscribed our names at Cap Codd ye 11 of Nouember, in ye year of ye raigne of our soueraigne Lord king James of England, france, & Ireland ye eighteenth and of Scotland ye fiftie fourth. Ano: Dom 1620
Where in that text would one find mention of establishing a Christian nation?