2017 Senate election in Alabama by precinct. Source: <a rel="nofollow" class="external free" href="https://dataverse.harvard.edu/dataset.xhtml?persistentId=doi:10.7910/DVN/VNJAB1">https://dataverse.harvard.edu/dataset.xhtml?persistentId=doi:10.7910/DVN/VNJAB1</a>
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