Erm... almost every country is a protectorate of the U.S. foriegn policy apparatus, except for a few "rogue" states... that's like asking if relations between colonial India were strong with Britain in the 19th century...
I'm partially joking, but that's mostly true... especially on the military end.
(I don't like it, but that is the current state of affairs, its actually not so much the U.S. as a handful of multinational corporations that happen to mostly be based in the U.S., and American people and military are dragged into protect, what are essentially the foriegn interests of supranational corporations that are subject to very few laws, yet reap the benefits of their host countries, whether in the U.S., Latin America, Europe, or anywhere else in the globe)
Most of the world, in terms of the economy, is owned (and therefore controlled) by basically 10 corporations, many of which are allied themselvbes. They are almost like non-nation nations in terms of their size and influence.
Although, many Canadian businesses have started penetrating U.S. markets further than ever before though... especially in the field of construction contracting, but many are in turn owned by "the big ten", which I can't remember the list off the top of my head.