KFF Health News Jun 3 2025 Navajo Nation leaders took turns talking with the U.S. government's top health official as they hiked along a sandstone ridge overlooking their rural, high-desert town before the morning sun grew too hot. Buu Nygren, president of the Navajo Nation, paused at the edge with Health and Human Services Secretary Robert F. Kennedy Jr. Below them, tribal government buildings, homes, and juniper trees dotted the tan and deep-red landscape. Nygren said he wanted Kennedy to