Fort Walton Beach
Re: Political Control of a Colony
The last paragraph of the playtest rules (v9.8) states:
The side with the most Political Control markers in the colony controls the colony. If tied, neither player controls the colony. To control Canada, both Montreal and Quebec must be controlled. (See 10.0)
This is pretty unambiguous. Canada is the only exception, where you must control both Montreal and Quebec to control Canada.