Both constitutional law and administrative law shape the work of public administrators. What is the difference between the two categories of law?

Revisit the case of Brian Jackson v. Alan Ritchey Materials Co., LC and then answer these questions:  

a. How does the work of ALJs enable the operations of agencies that employ them?

b. Stakeholder interests are served by administrative law. How was Brian  

Jackson’s interest served? How were the Ritchey Company’s interests served? How were the government’s interests served?