citizens of other countries enter Canada all the time with their foreign passports, so it's not obvious to me what the challenges are, however:
Quote:
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Canadian citizens returning to Canada who present other documents, such as a Certificate of Canadian Citizenship, birth certificate, provincial driver’s licence or foreign passport, instead of a Canadian passport, may face delays or be denied boarding by transport companies.
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http://travel.gc.ca/travelling/publi...al-citizenship
interesting question, as I am contemplating getting American citizenship