Four days after the killing of top terrorist Abu Musab al Zarqawi brought the U.S. its most stunning military success of the Iraq war, the top Democrat on the House Intelligence Committee is calling for Defense Secretary Donald Rumsfeld to be fired because the military effort is failing. "I don't think we're succeeding militarily," Rep. Jane Harman told "Fox News Sunday." "Continuing the same course, you know, is not getting us anywhere," she insisted. "What would help with doubters - and there are doubters in both parties all over the country - [would be] if the president decided that Rumsfeld...