It’s been a decade and a half since anyone in Congress has attempted to put together a major overhaul of the health care system, and no one on Capitol Hill or the White House these days is under any illusions that it will come easy. But as the Senate Health, Education, Labor and Pensions Committee Wednesday becomes the first to begin the process of formally drafting a bill one that members will call the Affordable Health Choices Act it’s already clear that the task will be that much tougher because of the absence of the committee’s, and the issue’s, driving force