The best general key for the solution of questions of power between our governments is the fact that 'every foreign and federal power is given to the Federal Government, and to the States every power purely domestic.' I recollect but one instance of control vested in the Federal over the State authorities in a matter purely domestic, which is that of metallic tenders. The Federal is, in truth, our foreign government, which department alone is taken from the sovereignty of the separate States.

Perhaps it is a universal truth that the loss of liberty at home is to be charged against provisions against danger, real or pretended from abroad.