Q&A: What's happening at the US Postal Service, and why?

The U.S. Postal Service is warning states it cannot guarantee that all ballots cast by mail for the Nov. 3 election will arrive in time to be counted, even if ballots are mailed by state deadlines.The Centers for Disease Control and Prevention recommends mail ballots as a way to vote without risking exposure to the virus at the polls.The Post Office has lost money for years, though advocates note it’s a government service rather than a profit-maximizing business.