America is exceptional, but not because of any special access she enjoys to God. The United States had a highly unique origin in the acts of the Continental Congress and Constitutional Convention, and its national identity is uniquely rooted in ideas of equality and liberty, rather than race, class, or language, as had been the case for most European countries at the time.
But America is not the special vehicle of God’s purposes in the world. Some conservatives love to quote Psalm 33:12, “Blessed is the nation whose God is the Lord.” The nation whose God is the Lord is the Christian Church, not the United States. The church, not the United States, is the vehicle of God’s purposes in the world. To believe otherwise is to confuse the nation with the church, the spiritual with the temporal. That sort of confusion can justify all sorts of dangerous messianic political movements.
As a Christian, I believe that I am called to follow a moral and ethical code based on the law of God and the imitation of Christ. I hope that in so doing, however imperfectly, that I am a good influence (salt and light to use biblical terms) on those around me. However, I can't ignore the fact that I live n a pluralistic democracy where Christian faith is widely perceived as a lifestyle choice. For me to believe that I have a right to impose Christian-based laws and governance on those who do not subscribe to them would be at best hubristic, and at worst theocratic. In any case, how could I do when Christians can't agree amongst themselves on key issues like pacifism, abortion, and sexuality? To impose a Christian view on those who don't share it could only be a coercive act, and coercion, as I read the gospel, is antithetical to the nature and invitation of Christ to follow him willingly.
The history of Christianity in the west has long been composed of some groups buttressing the power of the day in throne and altar alliances (e.g. Catholics, Lutherans, Anglicans), and dissenters (e.g. Mennonites) retreating into self-isolating communities. Starting in the late 20th century, once dominant religious groups were slowly disenfranchised by secularization and political change. American evangelism, like British Anglicanism and French/Quebecois Catholicism before it), now seems to find itself on the way into exile which is why the stakes in this US election seem so high. Lose the Supreme Court to Clinton and the last chance of legislating a Christian agenda for at least the next few generations vanishes.
I think, though I can't prove, that this is why the authoritarian aspects of Trump's character have attracted American evangelicals even when his morality has been exposed as a sordid mess. If it takes a tribune to make America Great again, in Trump's phrase, as 'one people, under one God, saluting one flag', and if the popular vote threatens to elect Clinton, then democracy be damned.
Second to their betrayal of Christ's gospel of love, the betrayal of a republic that so many non-Christians have fought and died for, and that so many across the world still see as our best hope, is the great treason of the religious right in America. Their desire to impose a Christian agenda on America, even if well-meaning, has blinded them to the terrible danger that Trump poses to democracy. The political scholar Jill Lepore laid out this danger eloquently in a recent post for The New Yorker.