HOWARD KURTZ: “The criticism of Barack Obama has turned strikingly personal as some of his liberal media allies have gone wobbly on him. After playing a cheerleading role during the campaign, some are bluntly questioning whether he’s up to the job. If Obama is losing Paul Krugman, can the rest of the left be far behind? . . . It was liberal commentators, of course, who formed the leading edge of the most favorable coverage that any White House contender has drawn in a generation. Having swooned as they did, some were probably more susceptible to having their hearts broken.”