Although Congress does not possess plenary
legislative power, it has ample authority to
legislate in those areas that the states cannot or
will not enter.
Historically, Congress had to take the lead in
dealing with social and economic problems
Today, however, the states
are quite active in this regard.
Consequently, legislation in this country is a
complex and often confusing tapestry of state
and federal statutes, each of which must be
interpreted by courts.