What problems do you think might arise during a crisis if they executive power of the us government was held by three people?

If the executive power was held by three people, a crisis would be a very hectic time. There would be a lot of disagreement over what to do. Ultimately one person holding the executive power would be most efficient because he or she would just direct people on what to do as opposed to people arguing or debating over whats best. In a certain sense, a three part executive might develop much as ancient Rome did when three generals were appointed to rule the empire.