The Postmaster General has requested that Congress overturn the 1983 law that requires mail to be delivered 6 days a week, saying “”It is possible that the cost of six-day delivery may simply prove to be unaffordable.” John E. Potter, the Postmaster General since 2001, who began his career as a New York postal clerk in 1978 said that in addition to the $2.8 billion loss the USPS suffered last year, there would likely be a shortfall of $6 billion this year. The reason is that total volumn declined by 9 billion pieces last year, the largest drop in history. USA Today has the rest of the details. Which day will go? Saturday seems to be the most obvious choice, although Tuesday has the lowest volume.