Barack Obama is on cover of Rolling Stone for the second time this year, and the candidate answers questions on a host of subjects, from Iraq to the economy to his favorite comedian (it's Chris Rock). He also explains why he didn't pick Hillary as his running mate: "Look, Hillary was on my shortlist. She is an extraordinary public servant, and she's going to be a great ally in years to come, should I be fortunate enough to be elected. I thought that the skill set that Joe Biden has โ€” his temperament, the relationship we had built on the Senate Foreign Relations Committee โ€” made him a great fit at this time." Oh, and those Republican whiners saying that the librul media is trying to make Sarah Palin look bad by not Photoshopping her magazine covers should take a gander at the new RS cover of an obviously un-airbrushed Barack. [Rolling Stone]