How far will a America with Canada manifest?

The thing I’m asking here is about how far a USA with Canada via 1812 Quebec joining the revolution or something else leading to it becoming part of the USA.How far will a USA with this much territory manifest? Will they go further south? Will they even go that far west other then Texas? Perhaps they establish new republics in California and the like?
 
The addition of Canada adds a ton of potential resources but doesn't add significant actual power or population to the US so I don't think that adding Mexico is on the agenda. I think that the British would still work hard to keep Vancouver and British Columbia though if for no other reason than strategic ports and trading rights. Plus there is a significant chance under this POD that the Atlantic provinces either go independent or just remain part of the UK.
 
The addition of Canada adds a ton of potential resources but doesn't add significant actual power or population to the US so I don't think that adding Mexico is on the agenda. I think that the British would still work hard to keep Vancouver and British Columbia though if for no other reason than strategic ports and trading rights. Plus there is a significant chance under this POD that the Atlantic provinces either go independent or just remain part of the UK.
I’m going under the assumption that the USA annexes all of Canada here circa 1812 Atlantic provinces included along with Rupert’s land and such not to mention Oregon
 
Well it does add a impetus for the slave states to add some slave states to prevent being outweighed politically. So a Carribean adventure or taking more out of Mexico.
 
I don't think Quebecers would remain with the US if they'd rebelled at the same time, more of a sister nation to the north that they'd end up going to war with over who owns what.
 
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