Attorneys for Bernard L. Madoff, who confessed to running a $65 billion Ponzi scheme, have asked a federal judge to show him leniency at sentencing, citing cooperation with federal officials. Madoff, 71, faces up to 150 years in prison when he is sentenced June 29. He pleaded guilty in March to a massive fraud, in which he paid off old investors with money from new clients. In the weeks before the fraud came to light, his clients were told they had as much as $65 billion. "We seek neither mercy nor sympathy," defense attorney Ira Sorkin wrote in a letter...