He pledged to continue efforts to obtain water rights to the lower basin of the Colorado River in Arizona. Sharon Chischilly for NBC News"My job as the president of the Navajo Nation is to represent and protect the Navajo people, our land, and our future. The only way to do that is with secure, quantified water rights to the Lower Basin of the Colorado River," Nygren said. In separate litigation in state court, the tribe has fought for access to the Little Colorado River, another tributary of the Colorado River. A previous attempt to settle Navajo claims to the lower Colorado River failed about a decade ago.