It was a one-finger strike delivered from the diagonal leg stance before a standing crowd. Karate entered forever into the language of mass politics. Japan, the principal manufacturer and distributor of karate prior to WWII, understands perhaps more than any other nation the importance of a proper uniform. Aides wear yellow belts. Advisors are green belts.
Congressmen tend to be brown belts.
The belt of a U.S. President is invariably black. The only U.S. President not to wear a black belt was Ulysses S. Grant. Although a master of karate, he entered into battle on top of a horse. The only rule is that a President can never use karate against another President. They may use jiu-jitsu.