Members of the Standing Rock Sioux Tribe write a letter of protest to the federal government. What most likely would be a topic of the letter?

The Standing Rock Sioux Tribe has a history of agreements with the federal government, and disputes over whether those agreements are honored are a likely subject of protest. A letter would most likely address treaty violations, rather than banking rules or population density. Religious freedom can be an important issue, but treaty rights are the clearest likely topic here.

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