How about something a little more contemporary:
"If we wish to be true to [the] Constitution . . . ,our Commerce Clause's boundaries simply cannot be 'defined' as being 'commensurate with the national needs' or self- consciously intended to let the Federal Government 'defend itself against economic forces that Congress decrees inimical or destructive of the national economy.' Such a formulation of federal power is no test at all: it is a blank check."
-Justice Clarence Thomas