Examples -- well, I started out researching, after hearing about it from another writer in my class, Dominionism, and ended up learning about that, Christian Reconstructionists, and the Council for National Policy (an extreme right wing secretive group that has Dominionists in its fold.) The basic thing that worries me is that these groups have as their agenda to turn our country into a "bible-based" set of laws - "return to the Christian roots" -- there are people brainwashed into believing that this is, and was always intended to be, a Christian nation (they cherry pick their sources, obviously, or they would know better) - and they are using patient and insidious means. They have been working towards this goal (can you imagine what it would be like if the bible was the basis of all law in the land?) for what, over 30 years, and they are trying to raise up generations of Christian leaders to change things from inside the system.
Oh, and don't forget the Quiverful movement, basically trying to breed their way into the majority. Mind you, I have NO problem with Christians as a rule - most of the ones I know are lovely people who accept me for who I am. But the fundamentalists, as a movement, scare me. (And remember, they tend to vote the way their pastor tells 'em to - so that gives a large amount of say in the hands/mouths of a small number of people.) These are people who, essentially, are taught to not think for themselves.
When you spend enough time reading the excerpts, or listening to smuggled tapes (the versions that are usually done publicly for the general population are sanitized) - it shifts your thinking a bit.