The debate over the challenges faced by the United States Postal Service and how to solve them roils on. From funding cuts to concerns over mail-in voting options, there’s much at stake for the future of the service. This hour, our guests discuss the history of the USPS, the sources of its financial trouble, its role in American democracy, and what’s next. Our guests: Richard John , professor of history and communications at Columbia University, and author of “Spreading the News: The American