Every theater-style seat in the White House briefing room, now closed for renovation, had a brass plaque inscribed with the name of a news organization. Only one, in the middle of the front row, had a name: “HELEN THOMAS,” it said. The unique assigned seat between the chairs for CBS News and ABC News was reserved for the legendary United Press International correspondent who is now a columnist for Hearst Newspapers. The press corps is scheduled to move from temporary facilities back into the spiffed-up, rewired briefing room in May or June. Thomas, who has been questioning presidents and press...