Which types of issues is the national government responsible for? which types of issues are primarily state issues?

The national government usually handles the type of issue that would affect the whole nations. Example of the issues would be: Counter terrorism, handling foreign affairs, constitution related matters, etc.

The states on the other hand only had the jurisdiction in issues that affecting people in their own state, such as handling local taxation, handling state court system, etc.

The federal government is responsible for national defense, levy taxes, borrow money, relations with other nations. State governments are responsible for criminal justice, building roads and other infrastructure, providing education.