Canada and the United States are the world's largest trading
partners, with $560 billion US of two way trade in 2007.
About 40 per cent of Canada's annual
economic output is exported to the United States,
while Canada is the leading export market for
36 of 50 U.S. states.
About seven million U.S.
jobs depend on U.S. trade with Canada.
Rising protectionism would hurt both
countries, economists say.
See article Washington Post.