Most unlikely. Not all of Brazilian society supported the idea of slavery and Emperor Pedro II was pretty much reigning on borrowed time since the time of the War of the Triple Alliance. Emancipation of Brazilian slaves is being talked about in circles.
No, in such case the issue would be to stop the USA from dominating the American continent.
No, in such case the issue would be to stop the USA from dominating the American continent.
Why would Brazil care? At the time they would be aware that there was still both Canada and Mexico that any US expansion would have to contend with - and Canada was part of the British Empire.
Similar reason as to why USA cared about Vietnam. Mexico was an industrial dwarf at the time.
If USA have a manifest destiny type of ideology or that documented proof comes out that the USA`s long-therm plans is to expand southward(possibly with the help of england), until all of america is their colony...