Ideally the person should first be a successful mayor of a typical large US city with 1 million or more people. Then they should be a successful governor of a state for at least 8 years. Then they should serve in Congress for 4 - 8 years, and have had lunch with two-thirds of the members of Congress at least once.
Mrs. Sparks cares about what is taught in schools because she is a parent of a child in the school system and therefore has a right to protect what she views as her child’s best interests.
The exchange that most affected the indigenous people was the one of diseases. Native Americans hadn't encounter the diseases the European brought before, so they hadn't develop immunity to them. This is the major reason of the large death of Native Americans, besides the war between them and the brutality of the Europeans.