Recent changes at the U.S. Postal Service are causing mail to slow down. The delays could lead to more business shifting to private-sector competitors — and that could have consequences for workers. Most private competitors are less generous with pay and benefits than USPS, which has long been considered a provider of “solid middle-class jobs.” Plus: Bankruptcies are on the rise, apartment vacancies could lead to less affordable housing and a look at the perils of industrial farming and the risk to food.