More than 3 million Californians may have to go back to the Department of Motor Vehicles to get new driver’s licenses. The federal Department of Homeland Security sent a letter to Gov. Gavin Newsom telling him the new licenses do not comply with Real ID requirements because the state did not adequately verify the residences of drivers when they applied for or renewed their licenses. This means the licenses cannot be used as ID to board airplanes or enter federal buildings after 2020.