The U.S. Postal Service has cut its staff by 25,000 this year as it struggles to reduce massive deficits, Postmaster General John Potter said Monday. Postal employment is now below 635,000, Potter said, down from about 800,000 in 1999. Thousands of carrier routes have also been eliminated as mail volume declines, he said. "We have an infrastructure that, quite frankly, we cannot afford based on the income we're receiving," Potter said. The agency still faces a potential $6.5 billion loss this year, Potter said, and even with increased borrowing and other changes it could finish the year with a $1.5...