HELP For what political reason did southern slaveholders care whether new states were free or slave?

The reason can be attributed to the fact that if more states became free, then those states can easily overturn any southern legislation in government that aligned with their pro-slavery views and if more states became slave states, then the South would have a political advantage in the federal and state governments as this would mean more states would push for southern-aligned legislation.

Explanation:

the government paid religious orders to provide basic education to native american children on reservations. in the late 19th and early 20th centuries, the bureau of indian affairs (bia) founded additional boarding schools based on the assimilation model of the off-reservation carlisle indian industrial school.