Based on the American constitution, which internal and external stakeholders, in the policy making process, possess constitutional legitimacy for their role in making public policy? Do entities with explicit power have more influence than those entities with implied powers in making public policy? Should they? Why or why not?

I need a 1000 word response with at least one resource in compliance with APA. The reading material is from the following reference:

Milakovich, M. & Gordon, G. (2013) Public Administration in America Eleventh Edition Wadsworth Cengage Learning.....but another reliable source may be used.

This is a criminal justice administration PADM class.