If U.S. Attorney John Durham is conducting a criminal investigation, it’s not clear what allegations of wrongdoing are being examined.A review launched by Attorney General William Barr into the origins of the Russia investigation has expanded significantly amid concerns about whether the probe has any legal or factual basis, multiple current and former officials told NBC News.The prosecutor conducting the review, Connecticut U.S. Attorney John Durham, has expressed his intent to interview a number of current and former intelligence officials involved in examining Russia’s effort to interfere in the 2016 presidential election, including former CIA Director John Brennan and former director of national intelligence James Clapper, Brennan told NBC News.
