Native Voters Placed In The Wrong Voting Precinct
The lack of standardized postal service addresses on tribal lands causes many Native voters to be placed in the wrong voting precinct when they register to vote. That results in voters having their ballots rejected. For example, in the 2016 election, two Native voters living in the same house in Arizona were placed in different precincts. One was told they were in the wrong precinct and their ballot was rejected despite living at the same address.
Source: The Comprehensive Field Hearing Report On Historical and Contemporary Barriers to Political Participation by Native American Voters. Boulder, CO: Native American Rights Fund, February 2020.