This interactive animated scatterplot compares Texas county voter turnout and partisan margins between 2012 and 2018, with circles sized by population. The visualization includes a dropdown menu to highlight individual counties, and hover interactions add activation classes. It uses D3 v5 with SVG rendering, loading CSV data from an Amazon S3 bucket, and animates axes through a `setInterval` loop cycling among different data columns. The code also builds connecting lines with arrowheads between election years and displays a color-coded legend for word-wrap categories.