No Indian Removal Act

The Indian Removal Act of 1830 forced the last remants of the eastern tribes to move to poorer lands west of the Mississppi. During the trip to their new lands tens of thousands of died. It was the end of truly self-sufficent Native American nations in the eastern US. The act only passed by a narrow margin in Congress but what if it hadn't? Would Native Americans intergate to society sooner? Would there be more wars between settlers and Indians or would Jackson just find another way to remove the Indians?
 
Those tribes were already mostly assimilated into Dixie by the time of their exile. Given that, unlike Yankee culture, Dixie culture was heavily obsessed with class and caste, I'm not sure they could ever be fully absorbed into it.
 
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