The powers not expressly delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.

The Congress shall have Power . . .

To make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers,. . . .

No State shall . . . lay any . . . Duties on Imports or Exports, except what may be absolutely necessary for executing its inspection Laws. . . .

Let the end be legitimate, let it be within the scope of the constitution, and all means which are appropriate, which are plainly adapted to that end, which are not prohibited, but consist with the letter and spirit of the constitution, are constitutional.

This Constitution, and the Laws of the United States which shall be made in Pursuance thereof . . . shall be the supreme Law of the Land. . . .

In all the other Cases . . ., the supreme Court shall have appellate Jurisdiction, . . . with such Exceptions, and under such Regulations as the Congress shall make.