>> After all, Canada, not Iraq nor Saudi Arabia, is the largest supplier of oil and gas to the United States. It would certainly make the environmentalists happy, but it would also seriously affect the economy.
>
>Not really.
>
http://en.wikipedia.org/wiki/Economy_of_Canada>
http://www2.nrcan.gc.ca/es/ener2000/online/html/chap3b_e.cfm>Oil represents only about 8 billion dollars in a trillion dollar economy.
Furthermore, Canada imports oils, according to the links you provided, so if it loses one client, the need for importing reduces or dissappear, shrinking the significance those 8 billion dollars.
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