A constitution is the overriding law, because it establishes the fundamental principles of a government at either the state or federal level. This includes creating the branches of the government, bestowing and refusing certain powers to each branch, and preventing other governmental units from passing certain laws, specifically those which limit individual rights.
What are legal issues?
A set of rules and principles that determine a system of society's dos and don'ts, the institutions that legislate and enforce such rules. For example, when the party of the first part parties too hard, the party of the second part can sue.
Law and ethics
Most of the time laws are written, approved, and then enforced by the level of government where they were written. For example, a State law is enforced by the state. A Federal law is enforced by the Feds. In other words; State Laws and Government Laws go through a process to get approved, written into law, and then are enforced. Ethics are like rules of conduct. For example, Doctors have unwritten ethical rules or practices that they adhere to just because it's the right thing to...