While members of the press gradually filled their designated seats at the back of the hearing room where Dr. Ben Carson would undergo uncommonly friendly questioning about his plans to lead the federal department of Housing and Urban Development, members of the Carson family linked up in the hallway. One of his sons could be heard kindly coaching a relative over the phone about how to find the room. He has his father’s same signature tone, an understated steadiness (or what some might call an overstated drowsiness).