The Missouri State Fair has banned for life a rodeo clown who wore a Barack Obama mask during a bull-riding competition and suggested that “Obama” might be run down by an angry bull. “Hey, I know I’m a clown,” the still-unidentified performer said. “He [Obama] is just running around acting like one. Doesn’t know he is one.” Many in the audience were amused; at least some were offended. The event was captured on home video, which quickly made the rounds of news reports. In a press release Monday, the State Fair said, “the statements and actions Saturday night were inappropriate...