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There was interest in annexing Canada. There was also interest in using this as an opprotunity to take Florida
"But since the West had only ten votes in the House of Representatives, it could not by itself have led the country into war. It was the South Atlantic states from Maryland to Georgia that supplied nearly half (thirty-nine) of the seventy-nine votes for war. This Southern support for war led other historians to posit an unspoken alliance between Westerners who wanted Canada and Southerners who had their eyes on Florida. Yet Pennsylvania, which presumably had little interest in the West or Florida, provided sixteen votes for the war, the most of any state.β
From Wood's "Empire of Liberty"