Here, for no particular reason, is a picture of the president.
Interesting article at Research Digest:
Obviously some people lie more often than others. What's surprising is new research showing that the spread of lying propensity through the population is uneven. There is a large majority of "everyday liars", and a small minority of "prolific liars".
A few years ago Kim Serota and his colleagues put a figure on this. They surveyed a thousand US citizens and found that five per cent of the sample were responsible for 50 per cent of all lies told. Now Serota's group have analysed data from nearly 3000 people in the UK and they've found the same pattern - the existence in the population of a minority of extremely prolific liars.h/t: wetdry