Former Democratic Virginia Gov. and current Senate candidate Tim Kaine on Wednesday pledged his support for federal workers at a town hall in Arlington. At the event — sponsored by the American Federation of Government Employees, National Treasury Employees Union, National Active and Retired Federal Employees Association and other groups from the Federal-Postal Coalition — Kaine said that waging war against public workers “is not a management model that works.” “You and I both know that some — for one reason or another — want to make public employees the all-purpose punching bag in American political life,” Kaine said. “That,…