(Newser) – George W. Bush was supposed to deliver a speech in Denver today, but he canceled at the last minute because of a fellow speaker: Julian Assange. "The former president has no desire to share a forum with a man who has willfully and repeatedly done great harm to the interests of the United States," says a spokesman. Assange, who's under house arrest in Britain, addressed the YPO Global Leadership Summit yesterday by video, reports the Denver Post. (Read more George W. Bush stories.)