Hello. Due to the context of your question, I believe there was a typo and the correct word would be "states" instead of "stat." If that is the case, I hope the answer below can help you.
Answer:
A good example of conflict over states' rights would be a case of Nullification Crisis.
Step-by-step explanation:
Nullification is the term that refers to the ability of states to reject federal laws that they believe to be unfair, incorrect, or offensive in relation to state laws. A case of nullification can cause a political and governmental crisis in the country, causing many problems and harm. An example of this occurred in 1832, when South Carolina regulated some policies established by the federal government and claimed its privilege to invalidate federal decisions.