Example: Last week the Missouri legislature passed a law declaring that life begins at conception.
The word "sharia" simply means path or way. Christians have tried to impose their opinion of The Way into American law since the beginning of the country. Everything from Blue Laws to the laws preventing homosexuals from entering into marriage contracts are examples of Christian Sharia.
Another example of Christian Sharia has been the tendency of some Christian religions to ignore secular law. The Catholic Church's efforts to hide molesting priests was based in the belief that Catholic ecclesiastical justice had primacy over the civil laws against rape.
The "Christian Nation" that Sarah Palin and Glenn Beck advocate is simply a nation where Christian Sharia law has been imposed.