British Prime Minister Rishi Sunak on Friday vowed to ban a dangerous breed of dog known as American XL Bully behind a number of recent attacks, most recently believed to be behind a man’s death this week in Staffordshire.British Prime Minister Rishi Sunak on Friday vowed to ban a dangerous breed of dog known as American XL Bully behind a number of recent attacks, most recently believed to be behind a man’s death this week in Staffordshire.