Even the tribe is asking for help to get rid of the protesters.
Via WaPo:
The federal government announced Friday that it was dispatching Bureau of Indian Affairs agents to help clear Dakota Access Pipeline protesters from the Standing Rock Sioux reservation.
The tribe and its allies have been lobbying against federal approval of the 1,170-mile pipeline, which crosses four states and would carry crude oil from the rich shale-oil basins of western North Dakota to the pipeline networks and refineries in Illinois. While many business, farm and labor organizations back the project, arguing it remains the safest ways to transport oil, a coalition of tribal and environmental groups argue it will accelerate climate change and could disturb sacred burial grounds and archaeological sites and potentially pollute water sources.
In response to a directive from President Trump, this week the acting secretary of the Army, Robert Speer, ordered the Army Corps of Engineers to expedite review of an easement for the pipeline to run under Lake Oahu.