Sweeping the dojo floor and picking up trash is the responsibility of mudansha, or lower belt students, leaving the dansha (black belts) free to warm up before class

That statement is false.

In most karate communities, sweeping dojo floor and picking up trash are the responsibility of all members,
They all commonly clean the room together right before and after a training session.

The president's only official legislative duty is to sign or veto bills.