Data Vis Dispatch, November 10: A blue wave, pi, and the pancake index

We begin this week by taking a look at the historic results of the U.S. midterm elections, which saw the Democrats secure a victory after winning many of the competitive races, despite the Republicans' redistricting efforts. Slow vote counting delayed results in some areas, while tech and AI-related stocks declined following the Democrats' win.

Taking a closer look at the results of the U.S. Senate elections, the Democrats flipped multiple seats and secured major victories in Texas. A ranking of prediction markets shows varying levels of prediction accuracy. Meanwhile, despite spending millions on marquee races, Republicans still lost a number of seats.

Turning to the results of the U.S. House elections, the Democrats secured their largest majority in almost two decades following a shift in votes.

Focusing on voter demographics, many major demographic groups shifted to the left, contributing to the Democrats' victory.

Moving on to the subject of bikes, as cities move towards becoming more bicycle-friendly, take a look at a planning tool for bike networks in European cities.

We present a new selection of visualisations from the #30daymapchallenge, covering Paris' population density, the 40 largest river basins, Frankfurt's building shadows, and Cologne's public transport network.

As grocery prices continue to rise, comparisons between the U.S. and Germany reveal interesting differences. Check out the Pancake Index to explore the affordability of pancakes in relation to rising prices.

We end this Dispatch with some other interesting topics: the struggling efforts to clean up the Ganges River, rocket launches, and a 2026 Visualising Climate-inspired data viz!