ONE OF THE ADVANTAGES of spending a great deal of time in London is the opportunity to meet with Britain’s prime minister from time-to-time, and to watch him in action through the eyes of the British media. Americans who have witnessed his performances in the press conferences that inevitably follow his visits to Washington and Crawford almost uniformly admire his eloquence and passion. But few appreciate the risks he is taking to support America’s efforts to create a pacific, democratic and prosperous Iraq in the place of Saddam Hussein’s hell-on-the-Euphrates.