An understanding of the DeCanas decision is facilitated by an initial examination of the general elements of the preemption doctrine. A working definition of preemption will be given. This definition will be considered in its two forms: preemtion which is constitutionally mandated and that which is congressionally mandated.
Francis X. Pray,
Preemption in the Field of Immigration: DeCanas V. Bica,
San Diego L. Rev.
Available at: https://digital.sandiego.edu/sdlr/vol14/iss1/12