The Most Detailed Maps You’ll See From the Midterm Elections
This is the home page of the man, the legend, the one and only Michael Bostock! When it comes to data visualization, Mr. Bostock sets the standard. His work is amazing. Because of its visual clarity, one of my favorite maps is about the 2014 Senate election, from the New York Times.
Here's a screen cap in case you cannot get to the site.