Question

People who take a "layer cake" view of federalism believe that

Answer 1

People who take a "layer cake" view of federalism believe that  

state governments are too weak to meet most citizen needs

state governments are supreme over the national government

national and state governments must cooperate to meet citizen needs

national and state governments are exclusively sovereign in their areas

Answer 2

In general, people who take a "layer cake" view of federalism believe that state and national government should be as separate as possible, since they don't want state's rights to be trampled upon.