What the Vice President does is to as presiding officer of the Senate. And is the assistant to the President.
And lastly, if something happens to the president like either the president was assassinated or impeached the Vice President takes over unitl the terms are over.
The treaties were used to remove the Cherokee and other native American tribes from their lands by telling and persuading them that they would be moved to a better 'more civilized' place for new life opportunities.