No.
No
No. Canada is it's own country
It hasn't. Canada is its own country.
I do not believe there is any prohibition against it. If Canadian citizens can (and DO) own property in the US I have every reason to believe that US citizens can own land in Canada.
No, each has their own currency.
Because the US lost the War of 1812
US
Yes, Canada is its own country.
the united states struggles to keep its own national identity from being overshadowed by Canada's?
Great Britain used to own both of them.
The Louisiana Territory which was purchased by the US in 1803.