Whatever 'privileged' is for one:
"Canada is fighting at Pacific Rim-area trade talks to maintain its privileged commercial relationship with the United States "
And:
"One in seven Canadian jobs depends on trade with the United States, Ottawa says."

Subsidizing your military by at least 10 billion every year adds up too.

https://www.theglobeandmail.com/news/politics/canada-battles-to-maintain-special-access-to-us-market-in-tpp-talks/article25769740/