That just means that there are a lot of people in America who claim to be Christians. However, a large percentage, perhaps a majority of those people do not practice anything like the Christian faith or hold Christian beliefs. Hence, the term Post-Christian.

Strangely, the Evangelicals and Conservative Catholics are among the few groups who understand there is no Christian majority and realize they are the minority. Thus, they are willing to compromise with secularists with like Trump. While many of the secularists are not willing to compromise with them. It’s an interesting new reality we must accept and understand.