Canada, a nation within the United States

From the Glib&Mall :
"The Conservative government is floating plans to block takeovers and investment from foreign state-owned firms should it detect a threat to Canada in the transaction, a move triggered by China's global prowl for acquisitions."

Well, I've certainly argued for this, although I wouldn't have singled out China or bothered with delicate distinctions between foreign state-owned firms and firm-owned states. (Firms? Who says firms any more?)
But look at the assumptions in this next bit :

"Greater Chinese inroads into the oil sands would certainly unnerve American policy makers, who always include Canada's tar-rich deposits in the equation when they discuss how the United States could achieve energy independence."

So Canada is now voluntarily initiating policy to facilitate a smoother US takeover of our resources?
When did the US cease to be a foreign power?
Yeah, I know, but it bugs me the G&M just takes it for granted.
The list of 'unfriendlies' is interesting : Russia, Saudi Arabia, Iran or Venezuela. What - no North Korea?

The Cons - vigilantly protecting the national interests of the US.