NBC-owned television stations in cities across the nation just teamed up with a nonprofit “journalism” group funded by a billionaire husband and wife team who not only spent millions campaigning for President Obama but also topped donor lists to groups like ACORN and MoveOn.org. The nonprofit, ProPublica, will contribute to the news operations of all NBC owned-and-operated stations, including those in such cities as Los Angeles, Chicago and Philadelphia, the network announced Monday. The NBC affiliates will get early access to investigative reports from ProPublica, which describes itself as an “independent, non-profit newsroom that produces investigative journalism in the public...