the relationship between provincial and federal parties in BC

What is the relationship between provincial and federal parties in BC. How and why has it changed since the 1940s.

prefer footnotes, Chicago style. Separate bibliography.
1 cover page + 8 essay page + 1 reference page.
5 peer reviewed articles.
2000 words maximum.

Elements for successful paper :-
a) Organization
b) Clarity
c) Evidence
d) Style