Supreme Court to decide Navajo Nation's water rights case.

The Supreme Court will hear a case on Monday to decide whether the federal government has broken its promises to the Navajo Nation for more than 150 years regarding water rights. The Navajo Nation blames the U.S. government for having breached its duty of trust that came with an 1868 treaty that established their reservation in what is now northeast Arizona and smaller portions of southeastern Utah and northeastern New Mexico. The case comes before the justices during an era of drought in the West and 100 years after execution of the Colorado River Compact that divided water among seven states including California, Arizona and Nevada.