Barack Obama returned to Chicago Sunday and made an appearance before the UNITY minority journalists' convention (including the whole soup of black, Latino, Asian, and Native American journalist solidarity groups.) The Chicago Tribune's Swamp blog found some journalists were restrained, and some were not: At UNITY, the applause was restrained, after organizers reminded conference participants that the appearance was being nationally broadcast and they should make every effort to maintain "professional decorum." Still, Obama received a standing ovation from many in the audience at the start and end of his appearance. There was also a rush toward the stage after...