A person who wants to establish a "Nation" unto God generally has an alternative motive

“Truly I perceive that God shows no partiality, but in every nation anyone who fears him and does what is right is acceptable to him.” (Acts 10:34-35)

God will judge all men according to they themselves who live in various nations...and not because of being part of a nation. The ideas of theocracy or a country that establishes laws in order to make the nation Christian is doomed to fail...since sin and evil are a matter of and from the heart of man. We see people who claim to be Christian on almost a daily basis who have been uncovered doing sexual sins or theft...so an environment meant to build Christians still has to rely on one thing as a foundation: the person. Conversations from what has become known as a party who wants to establish the USA as a Christian Nation is entirely wrongheaded....and not because it is not possible...it is because it ABSOLUTELY is NOT possible. In all Biblical history the number of attempts have been plentiful...but the end result NEVER fruitful. God has established nations.

Romans 13:1-3: Let everyone be subject to the governing authorities, for there is no authority except that which God has established. The authorities that exist have been established by God. 2 Consequently, whoever rebels against the authority is rebelling against what God has instituted, and those who do so will bring judgment on themselves. 3 For rulers hold no terror for those who do right, but for those who do wrong. Do you want to be free from fear of the one in authority? Then do what is right and you will be commended.

A person who wants to establish a "Nation" unto God generally has an alternative motive: To establish themselves in power. Don't take their bait.