Amid all the scrutiny that Malia Obama has been subjected to in her first months at Harvard University, nothing has attracted as much press attention as her being snapped by eager paparazzi kissing a white guy. The guy—identified by enterprising journalists as 19-year-old Rory Farquharson—is a British-born Harvard sophomore. The kiss, outside last week’s Harvard-Yale football game, suggests that the 19-year-old former first daughter is boldly asserting her independence after eight sheltered years in the White House. The families of presidents have always been the subject of tabloid fascination, but Malia Obama, like her father Barack Obama before her, inhabits...