Within the space of a day, the candidate has changed his position.May 18, 2008:  [If Iran] "tried to pose a serious threat to us they wouldn't . . . they wouldn't stand a chance."May 19, 2008:  "So, I've made it clear for years that the threat from Iran is grave."John Hinderaker asks, "Can someone explain why it is, exactly, that Barack Obama is not a laughingstock?"I can, John. Two words: media bias.(Read Full Post)