Things are so ugly for the members of the GOP right now, it’s worth pondering their political mortality: Put bluntly, can this party be saved? We talked to some of the smartest minds in Republican politics, and their prognosis is pretty grim. They think it will take pretty big changes — and possibly many, many years — to repair a Republican brand sullied by excessive spending, an unpopular war and an even more unpopular president. Republicans are deeply divided over how dramatic changes should be and how precisely to change things. But there appears to be an emerging consensus on...