..."I will do everything I can as prime minister to steady the ship over the coming weeks and months. But I do not think it would be right for me to try to be the captain that steers our country to its next destination," Cameron said. "This is not a decision I have taken lightly," he added.| Update at 12:30 p.m. ET: Newsweek has the entire speech here. He aims to have a new prime minister in place by October. |