Louisiana. and Arkansas to command rigged prices for natural gas which is so urgently needed by the citizens of the other States? Should the Great Lakes States and those of the upper Missouri Basin bonserve their fresh waters and dry up the ship channels of the Mississippi Delta? - Should Ohio prohibit the importation of tobacco to protect the public health? Should Florida and California pass laws prohibiting the entry of travelers unless they possess a visitors visa in the form of a roundtrip ticket and enough funds to sustain them for the period of their stay? Should the homebuilding codes of steelproducing Pennsylvania outlaw the use of inflammable Oregon and Washington timber in the interests of public safety? In this argument of States rights as against Federal preemption. is it entirely coincidental that the States which have most vigorously demanded States rights have also demanded the most Federal aid?