The AP reports: A deal is a deal, and the SuperSonics should stay. That was the message from city of Seattle lawyers as a federal trial began Monday to determine whether the NBA franchise will be forced to stay at KeyArena until its lease expires in 2010. SuperSonics owner Clay Bennett is trying to move the team — Seattle’s oldest professional sports franchise — to his hometown of Oklahoma City, two years before the lease expires. Bennett, who sat expressionless at the defense table, is hoping to pay Seattle no more than $10 million in lost rent for the next two seasons.