Apache County, Arizona is home to portions of the Fort Apache and Navajo communities, and was estimated to be 73% Native American in 2007. The Voting Rights Act and its subsequent amendments have had quite an impact in this county. Below, we see a crude measure of turnout - number of voters divided by total population (estimated between census years).
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There has been a steady increase in crude turnout in Apache County as one barrier to voting after another has been removed. At the same time, the share of the votes won by Democrats has generally increased.