More and more Obama is being likened to Lyndon Johnson, with Afghanistan becoming his Vietnam. Maybe. But the better analogy is to Jimmy Carter, particularly the president analyzed by James Fallows in a 1979 Atlantic magazine article, "The Passionless Presidency." "The central idea of the Carter administration is Jimmy Carter himself," Fallows wrote. And what is the central idea of the Obama presidency? It is change. And what is that? It is Obama himself.