By Michael Phillis And Sam Metz THE ASSOCIATED PRESS SALT LAKE CITY (AP)- On some parts of the Navajo Nation, where roughly a third of the people lack reliable access to clean water, people have to drive for miles on red dirt roads to lug water home. Others rely on unregulated wells or water delivery trucks. Already facing some of the most severe water scarcity in the drought-stricken Southwest, the tribe now has to deal with a Supreme Court ruling this week that will make securing water even harder for the 170,000 enrolled tribal members who live on its reservation. “I know the battle and the strategy moving ahead is going to be a lot more difficult,” Navajo Nation President Buu Nygren told The Associated Press. The tribe argued that…