Wisconsin, Ohio, California among states targeted by Russian hackers in 2016 race ... Senator McCain opposes Obamacare repeal bill, a possible fatal blow ... U.S. challenged by rising North Korea tensions, Russia urges calm ... Exclusive: T-Mobile, Sprint close to agreeing on deal terms - sources ... 'Unfit' Uber stripped of London license, CEO tweets 'pls work w/us' ... Trump administration drops guidance on college sex-crime probes ... Defying Trump, Iran says will boost missile capabilities ... Exclusive: U.S. agency claims huge hole in Westinghouse's pension plan ... Failing dam poses new crisis on Puerto Rico amid flooding from Hurricane Maria ... Trump takes center stage in fractious Senate race in Alabama ...