need detailed explanations for the following:
Identify the essential actors in the formulation of US public policy
Describe the historical evolution of major US public policy programs.
Describe the relationship of federal and state/local governments in policy formation and execution.
Explain the impact of past policy execution experiences on current policy debates.
Explain contemporary government responses to demands for new public policies.
Explain select bureaucratic institutions' effectiveness in making, reforming, and executing policies
Explain the contemporary debate about critical present-day public policy challenges.