Fifty years ago, a postal worker strike halted mail delivery. The eight-day strike, carried out by 150,000 letter carriers across 30 cities, prompted then-President Richard Nixon to declare an emergency and send in the National Guard to deliver mail. 

“The United States Postal System is a vital element of our entire communications system. The poor depend heavily upon it for medical services and also for government assistance,” Nixon said in an address to the nation. “Veterans depend on it for their compensation checks. The elderly depend on it for their Social Security checks.” 

Today, the Postal Service is just as essential: It delivers about 1 million lifesaving medications each year and serves as the only delivery link to Americans living in rural areas. Working with other delivery services like UPS, the agency supports $1.7 trillion in sales and 7.3 million private sector workers year, and this year will prove essential to delivering the 2020 Census to citizens as well as any vote-by-mail initiatives. The USPS is the federal government’s most favorably viewed agency, with an approval rating of 90%.

Yet once again, the USPS is in crisis mode.