Facing bleak developments on multiple fronts, President Obama is turning his attention to an unlikely source of positive news: Iraq. Obama will deliver a major address to the nation on Tuesday night highlighting his campaign promise to bring the war to a close. "As a candidate for this office, I pledged I would end this war. As president, that is what I am doing," Obama said in his weekly address, setting the stage for next week's speech. He said the United States is taking "an important step forward" as the last combat brigades leave the country, saying it will "mark...