Pre-emption check
The pre-emption check is simply a review of the existing literature on the topic you have selected. During a pre-emption check your goal is to make sure that no other article has "so completely and competently discussed the topic that you cannot significantly add to that discussion." You must also make sure that your issue has not already been decided by case or statute.
Performing a pre-emption check is valuable because it will:
If you find an article that completely covers your topic do not dismay!
With some reflection you can almost always come up with a different angle or point of view to cover. Here are a few ways you can take a new view of a topic: