Answer:
Any power not given to the federal government belongs to the people. 
Step-by-step explanation:
So anything power that is not specifically given to the federal government (like the president etc) is the responsibility and the power of the states and people (or state/local governments0
For example:
The federal gov. controls
- the army
 - if we declare war
- printing/regulating money
The states gov. controls
 - traffic tickets
-police dept. 
-giving/issuing drivers licenses