Christians of all types are confused about politics. The confusion increases when we add our faith. The two always seemed to mix. Now, not so much.
Why? The decline of Christendom, or cultural Christianity. This is often called the rise of the Nones. It is how culture moved from pretending to be Christian. People would do things like show up at church and hide their immorality.
According to many evangelicals, this culture was bad. We’d have unregenerate church members. It is easy to understand the desire for making sure church members are Christians. However, this isn’t as easy as it sounds.