federal jurisdiction:  all cases re:
-    federal question:  the C or federal laws; treaties made under US authority
-    ambassadors, ministers, consuls
-    admiralty
-    US a party; between states; [before 11th am between state and citizen of another state]
-    diversity:  citizens of different states
-  original jx = state is a party, ambassadors, ministers, consuls; everything else = appellate jx
-  trial of crimes by jury