This interactive bar chart displays the percentage of survey respondents by racial group who overreport voter turnout in three U.S. election years (2008, 2012, 2016). Buttons trigger updates between datasets, animating bar heights via D3 transitions. The visualization uses D3 v6 with `d3.scaleBand` for the categorical x-axis, `d3.scaleLinear` for the y-axis, and d3-axis to render both axes. Each bar’s y-position and height are recalculated from the value property, with a 1000-millisecond transition applied to all entering, updating, and exiting rectangles.