the "who" must not be a single person. For example someone (maybe the chief justice anyway) appoint, but the congress has to approve it. Sometimes this is don

the "who" must not be a single person. For example someone (maybe the chief justice anyway) appoint, but the congress has to approve it. Sometimes this is done even to make valid a vote by the population, and it works well (in Commonwealth countries, the Queen can not approve a election results if she wish so... fortunately this was never needed it seems).