Well now that will create a few butterflies.
In OTL the hope of getting Florida and possibly Texas was key in driving southern support for the War of 1812. The US had its eye on Florida in OTL so much so that an invasion was planned for early 1813 but was voted down by Congress. Americans had already been trying to move into Texas, and Andrew Jackson had already bought land in Texas.[/QUOTE]
Wanting Florida, certainly makes sense, being that it shared a border with Georgia, as well as the territories of Mississippi and Alabama. But the area that made up the current state of Texas was extremely remote in terms of US territories and actual population centers. There weren't too many Americans living west of the orignal 13 states in 1810, except for Ohio, Kentucky, and Tennessee, with a few living in outposts such as Saint Louis. Well I guess New Orleans was already a decent size place, but how many of its residents thought of themselves as Americans in 1810. So just saying I am not sure enough people really had any interest in Texas at that time. I read that Aaron Burr leased land in Texas from Spain, but did not know about Andrew Jackson. Are you sure about that?[/QUOTE]
110%, Jackson and a few Tennessee planters withdrew support after he was arrested for treason. It is in Nancy Isenberg's book "Burr." It wasn't some big thing, they met a few times; Jackson liked the idea and helped secure funding and manpower. When it came down the pipe that he was under arrest for treason, jackson ever the rational politician simply pulled the plug on something that was most likely a bad idea to begin with. The land he leased was in modern SW Arkansas, not Texas, and he got it not from Spain but as part of one of his many land speculation companies.
I agree with your deduction of Florida. As for New Orleans, I don't think they thought of themselves as Americans or anything but probably Spainiards (or whatever a Spainard in NA called themselves).
Its funny you bring St. Louis because that was one of the few Spanish garrisons outside of OTL SW and California. The Spanish usually went out once a year and rode around to show they owned the place. When it came to the Great Plains no except Indians were there.