text: That's a great question!\n\nWikipedia has an article on the Supremacy Claus which should be helpful to you.  Check it out and then read up on the several Supreme Court cases listed therein, they deal with important matters in which the Supremacy Clause came up.\n\nYou should be able to work it out from there.  Also, see if you can find any essays online about the Supremacy Claus.