In a scathing op-ed, the wife of a slain black St. Louis police captain accused the Black Lives Matter movement and other progressive activists such as Vice President Kamala Harris of dividing America, blasting them as “supervillains.” Ann Dorn, a retired sergeant from the St. Louis Metropolitan Police Department and widow of Capt. David Dorn, wrote in the op-ed published with Fox News Tuesday that her husband’s death was the product of Democrats and left-wing activists pushing an anti-law enforcement sentiment across the country. “Ultimately, David was murdered because the people who are supposed to protect our streets — active-duty...