More than half the cars produced by Porsche will be electric by 2025, the German manufacturer's North American chief said Tuesday as he set out plans to overtake market leader Tesla. */ "The future is electric," Klaus Zellmer told the Los Angeles Auto Show, adding that the brand's commitment to battery-powered vehicles is "huge." "By 2025 Porsche will have crossed a tipping point, actually building more than 50 percent of ...