This Washington Post story looks at voter turnout in South Carolina's primary election. The data viz is a set of maps that breaks down the increase or decrease in voter turnout by precinct. The thumbnail of the map made me click on the story because it seemed interesting, but once I was looking at it, I wasn't sure what I was seeing, or what it meant. In the article, they point out that white voters in higher income brackets helped Joe Biden win the primary, but that's not clear in the maps. The clusters of arrows help show where turnout increased, but I think color could have helped make the maps more clear. A bar chart to divide voters by income bracket may have also helped illustrate the story where the maps could not.
https://www.washingtonpost.com/politics/2020/03/01/south-carolinas-turnout-makes-bidens-win-even-more-impressive/?arc404=true