The Electoral College is a key aspect of the US presidential elections. Its mechanics and distribution of electors are crucial for presidential campaigns and determine the so-called battleground states – and possibly also distort the will of the people. I was interested this last effect, so I did a little analysis.

Would McCain be the oldest US President? Would Obama be the youngest? Who was the youngest president? Were presidents younger in the past or older? What is the highest number of years a former president lived after leaving office? Who served the longest? Whose term was the shortest? The interactive visualization below lets you answer these and a few other questions.

I used the Presidential Demographics chart in my talk at the Impact of Social Data Visualization panel at InfoVis 2007, and got some interesting responses to that. There is some interest in printing this out, so I have made a new version of the chart that is now also available as a PDF. Stephen Few used Joseph Berk's term "interocular traumatic impact" – a visualization that hits you between the eyes – to describe it. And this is exactly what visualization can do extremely effectively: visual communication, and not just of data.

The recipients of the Nobel Peace Prize 2007 are Al Gore and the UN Intergovernmental Panel on Climate Change. While the decision is undoubtedly a political one (not unlike this year's Nobel Literature Prize), Gore has made a huge impact with his documentary, An Inconvenient Truth. A large part of that comes from his use of graphs and charts.

With Tax Day (Observed) in the US tomorrow on Tuesday (even the IRS gets confused), I felt like a link to Death and Taxes: A Visual Guide to Where Your Federal Tax Dollars Go would be in order. This beautiful information graphic breaks spending down into all the 'small' things that tax money is spent on, from the FCC to the Army Corps of Engineers. A zoomable interface similar to Google Maps makes it possible to explore this huge graph. As Terry Yoo likes to say, the government's a big place! - and this graph gives you an idea just how much there is.

Enormous amounts of information are technically freely available, but are hard to access in practice. A lot of that data comes from data collection funded by taxpayers, or from data that needs to be reported for legal reasons. While much of that data has been lying around on the Internet for some time, only recently have people started building tools that make it easy (and often even fun) to play with it. Even though the types of data are very different, all these tools have one thing in common: they are primarily visual.

(Printable PDF)

With Hillary Clinton and Barack Obama being likely Democratic candidates for the 2008 presidential elections, it is time to look at the demographics of US Presidents over the years. The following diagrams compare their sex, race, and faith with the whole population in 2001.