President Trump has gone after Amazon's deal with the U.S. Postal Service largely over the rates the retail giant pays for delivery. But the service's top oversight board lacks the quorum it needs to consider such matters.
A quorum is the minimum number of members of a deliberative assembly (a body that uses parliamentary procedure, such as a legislature) necessary to conduct the business of that group. According to Robert's Rules of Order Newly Revised, the "requirement for a quorum is protection against totally unrepresentative action in the name of the body by an unduly small number of persons."