Here's someone who thinks he's analysed Tony Blair's personality using some sort of scientific method

The British choice in Iraq has been characterized as "Tony Blair's War," with many believing that the personality and leadership style of the prime minister played a crucial part in determining British participation. Is this the case? To investigate, I employ at-a-distance measures to recover Blair's personality from his responses to foreign policy questions in the House of Commons. I find that he has a high belief in his ability to control events, a low conceptual complexity, and a high need for power.

http://www.blackwell-synergy.com/doi/abs/10.1111/j.1743-8594.2006.00031.x?journalCode=fpa