And wanted to expand southwards in Mexico, Cuba and the Carribean in order to have a large slave-based empire.
And wanted to expand southwards in Mexico, Cuba and the Carribean in order to have a large slave-based empire.
This is part of why the South hasn't just dropped it. The war was started, in large part, over slavery but we learned that the United states are no longer united by choice.
This is part of the ongoing argument over state's rights vs federal power. The confederate flag is a racist symbol, but it's also a rejection of federal power over the states. Politics are complicated.
I suspect the revisionist interpretation of state's rights probably comes from the 50s fight against desegregation.
It's a bit of a tautology really, but there isn't a conflict between State and Federal powers until there is a specific disagreement. The document you linked says as much:
We affirm that these ends for which this Government was instituted have been defeated, and the Government itself has been made destructive of them by the action of the non-slaveholding States. Those States have assume the right of deciding upon the propriety of our domestic institutions; and have denied the rights of property established in fifteen of the States and recognized by the Constitution; they have denounced as sinful the institution of slavery; they have permitted open establishment among them of societies, whose avowed object is to disturb the peace and to eloign the property of the citizens of other States. They have encouraged and assisted thousands of our slaves to leave their homes; and those who remain, have been incited by emissaries, books and pictures to servile insurrection.
https://en.wikipedia.org/wiki/Filibuster_%28military%29
If you're looking for a more serious reference, Freehling's Road to Disunion devotes a chapter to the subject.
http://www.theatlantic.com/politics/archive/2015/06/what-thi...
For extending slavery beyond the borders of south, see the quotes of Edward Pollard and Albert Gallatin Brown at the end of the post.