The US Postal Service is still losing money — $3.8 billion last year, more than ever before, and Postmaster General John Potter says it's going to get worse unless Congress approves some drastic changes. Today, backed up by independent studies for improving an "untenable" business model, he asked Congress to cut Saturday deliveries and to provide more flexibility for price increases and negotiations with organized labor. Ed O'Keefe is the Federal Eye blogger for the Washington Post.