Should we free Canada?

I read a summary on Canada's history, which got me thinking. Should the US free the Canadians from their oppressive British regime? They are still a commonwealth nation, and its leaders are still the British monarchy. Any bill ped must be signed by the Governer General, who is the Queen's representative in Canada. They have a brutal regime and they want it changed. It wouldn't be a bad idea to free our neighbors to the north. Plus, they have an abundance of oil in their tar sands.