This scatterplot shows the relationship between voter turnout and election results for Texas counties in 2012 and 2018. Each circle represents a county, positioned by its Republican or Democratic margin and sized by population. Semi-transparent lines connect each county’s 2012 and 2018 positions to reveal shifts over time. The visualization uses D3 v5’s `scaleLinear`, `axisBottom`, and `axisLeft` APIs, with SVG rendering and CSS transitions for interactive highlighting. Data is loaded from CSV files via `d3.csv`, and jQuery manages the county selection menu and element reordering.