federalism - states rights

• division of power - among states and federal government 
• enforcmentof federal power ( i,e, laws) 
• cooperation (i.e. concurrent power) between state and federal governments 
• in addition to the constitution, the courts (i,e, supreme court) has determined the limits of power of the federal government and state government 
• current key battle grounds of federalism 
• voting rights 
• healthcare 
• enviorment 
• immigration 
• california vs trump