1. An example would be the US government under the Articles of Confederation. The court system was under the states, and there was no judicial branch. Therefore the states could break national laws and the federal government couldn't enforce them.
2. It's different because the government under the Constitution now can crack down on laws with the executive and judicial branches.
3. The Whiskey Rebellion proves that the Constitution gave the federal government significant power to enforce the laws it creates.
