The US Postal Service is running a shadowy surveillance program that tracks Americans’ social media posts — including ones about planned right-wing protests, a report revealed Thursday. The so-called Internet Covert Operations Program enlists the law enforcement arm of the USPS to hunt down “inflammatory” posts — made by groups ranging from the Proud Boys to demonstrators protesting coronavirus lockdowns. Posts deemed threatening are then sent to federal, state and local law enforcement agencies to be monitored.