NEWYou can now listen to Fox News articles! New Jersey Democratic Gov. Mikie Sherrill’s recent announcement of 6,600 ineligible voters found on the state’s rolls is only the latest in a decades-long string of cases involving noncitizens registered to vote in U.S. elections, records show.Sherrill said that the ineligible voters were registered due to a "serious software error" in New Jersey’s Motor Vehicle System. Her announcement came within a week of a major address from President Donald Trump in which he warned that digital election interference posed a "cyber threat aimed at the very heart of our democracy."While New Jersey…