Colorado and Washington have legalized marijuana use with both states instituting regulatory systems somewhat like those for alcohol. Marijuana use remains illegal under federal law, but as previously noted, the Obama administration has announced that it will not aggressively enforce federal standards as long as the states establish satisfactory regulatory oversight. Should the federal government enforce its criminal laws in those states? Should the federal government attempt to preempt the state laws, asserting that those laws are in unconstitutional conflict with federal law? Explain.