Read in the light of the present day, such views constitute the most striking of all commentaries upon our constitutional history. Manifestly the powers reserved to the States were expected to serve as a very real and potent check upon the federal government; and yet we can see plainly enough now that this balance of state against national authorities has proved, of all constitutional checks, the least effectual. The proof of the pudding is the eating thereof, and we can nowadays detect in it none of that strong flavor of state sovereignty which its cooks thought they were giving it. It smacks, rather, of federal omnipotence, which they thought to mix in only in very small and judicious quantities. "From the nature of the case," as Judge Cooley says, "it was impossible that the powers reserved to the States should constitute a restraint upon the increase of federal power, to the extent that was at first expected. The federal government was necessarily made the final judge of its own authority, and the executor of its own will, and any effectual check to the gradual amplification of its jurisdiction must therefore be found in the construction put by those administering it upon the grants of the Constitution, and in their own sense of constitutional obligation. And as the true line of division between federal and state powers has, from the very beginning, been the subject of contention and of honest differences of opinion, it must often happen that to advance and occupy some disputed ground will seem to the party having the power to do so a mere matter of constitutional duty."[4]