Also, "conservative" today increasingly means "socially conservative" which in turn often means "evangelical Christian", to such an extent that the terms are usefully interchangeable.

This is the result of a direct and honest strategy of courting socially-conservative religious people who believe the country is being dragged "in the wrong direction" by people with "a radical social agenda".

While there are people who disagree with the general mainstream of socially-liberal belief in this country who aren't motivated primarily by religious beliefs, they are rare enough compared to the religious majority to not be worth mentioning most of the time.