This bar chart compares the popularity of U.S. political parties by state, aggregating vote counts from 1976–2018 Senate elections. Each bar represents a state, with its length encoding total votes and its color encoding the party category, allowing a direct visual comparison of party support across states. The visualization uses the Vega-Lite API with d3 for data loading from a Harvard Dataverse CSV source, and configures the visual appearance through a custom config object.