Representative Cynthia A. McKinney and her legal advisers blamed racial bias Friday for her run-in with a Capitol police officer as the incident ballooned into a political furor. At a news conference at Howard University, Ms. McKinney, a Georgia Democrat, said her physical altercation with the unidentified officer, who was screening visitors to a House office building on Wednesday, was the officer's fault. "Let me be clear," Ms. McKinney said, surrounded by supporters at the historically black university. "This whole incident was instigated by the inappropriate touching and stopping of me, a female black congresswoman. I deeply regret this incident...