Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. UK Attack Now Political Football as Johnson, Corbyn Spar Associated Press Britain's political leaders sparred Sunday over who is responsible for the early release of a convicted extremist who launched a stabbing attack in central London that left two dead and injured three. The argument centers over the early release from prison of Usman Khan, who served roughly half his sentence before being set free. He was able to stab five people before being shot dead by police despite conditions imposed on his release that were supposed to protect public safety. After a one-day pause out of respect for victims, the Friday attack is dominating the political scene as the Dec. 12 election nears, shifting the focus, at least for the moment, from Brexit and the National Health Service to issues of security and criminal justice. Prime Minister Boris Johnson on Sunday blamed Khan's freedom on changes in sentencing rules made by the last Labour Party government before Johnson's Conservatives took power in 2010. He promised to toughen sentencing laws. "I think it is repulsive that individuals as dangerous as this man should be allowed out after serving only eight years and that's why we are going to change the law," he told BBC's Andrew Marr Show. .