In its simplest form, this will involve raising taxes at the high end and reforming entitlements enough to ensure their continued success and sustainability. Much of that, an accountant could do. But it takes a gifted politician for the heavier lifting. That leader will have to make his still-fledgling health care act work and earn his premature Nobel Peace Prize on an issue like climate change. In the process, he could restore the good name to traditional liberalism.