Is the United States going to decide, are the people of this country going to decide that their Federal Government shall in the future have no right under any implied power or any court-approved power to enter into a solution of a national economic problem, but that that national economic problem must be decided only by the States?... We thought we were solving it, and now it has been thrown right straight in our faces. We have been relegated to the horse-and-buggy definition of interstate commerce.