At US/Canada border - what to use US PR Card OR Canada PR Card?

From Dec/2004 to Dec/2007 , i was candian resident and after US green in Dec/2007, I am in USA.

What should i use at the border - Canada or US GC while entering Canada from USA ?

Also, should i file for Canadian citizenship ? Will it impact by US Citizenship ?
 
I would advise you to move back to Canada and continue to live there until you get your citizenship. Then move to the USA for good.

From Dec/2004 to Dec/2007 , i was candian resident and after US green in Dec/2007, I am in USA.


Also, should i file for Canadian citizenship?
 
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