President Joe Biden has formally apologized to Native Americans for the "sin" of a government-run boarding school system that for decades forcibly separated children from their parents, calling it a "blot on American history" in his first visit to Indian Country. The president on Friday detailed how his policies have sought to support Native Americans with jobs and new infrastructure. Democrats hope Biden's visit to the Gila River Indian Community's reservation in Arizona will also provide a boost to Vice President Kamala Harris' turnout effort in a key battleground state. It's a chance for Biden to spotlight his and Harris' support for tribal nations, a group that historically has leaned toward Democrats.