Public Administration in Federal Context

In defining the scope of national or federal government authority, especially regarding conflict and overlap with state authority, what issues must be resolved? “In the American partnership of governments, the federal government is truly the “senior partner, and it can make the state and local governments do just about anything it wants them to do.” Do you agree or disagree? Please identify a current issue that has created conflict between the federal government and state governments. How did the state(s) attempt to address the issue? What was the outcome, in order words, did the federal or state government win the ‘battle?”