He can really play! I’m stunned and impressed. I wasn’t expecting this. Having a musical or artistic skill is probably a good way to relax, bring some level of balance back to one’s life. This hobby is completely removed from politics. Some in high pressure jobs will golf, while others will create music or images.
It sure works for Condolezza Rice.
They say that mathematical aptitude and musical aptitude are closely linked. Can't prove it by me, as I'm quite musical, but my math skills are strictly visual, like geometry. I guess Barr uses his aptitude to "weigh" the scales of justice!