That's pretty cool. I would like to see him in action... at 57 no less. Finally something I can admire in a Democrat.
My personal favorite martial art for when you get over 40 is Wing Tsun Kung Fu. It doesn't exhaust me the way karate did... well, at least it shouldn't. Most important it is designed for a smaller weaker person to defeat a larger, stronger opponent.
Jeet Kune Do was based on this art.
Check out some of the short films on Jeet Kune Do here... this style is largely based on Wing Tsun.
My personal favorite is Ed parker's kenpo. It is a very efficient and devastating art. After studying Goju karate for many years, I switched to kenpo and will never go back, although I think Goju is an excellent art also. I was never impressed with the Korean styles, such as TKD and TSD.