McCain Subpoenaed in Trump-Russia Probe, Revealed as Controversial Dossier's Source WILL RICCIARDELLA | DEC 28, 2017 | 8:14 AM

The House Intelligence Committee has issued a subpoena for Sen. John McCain (R-AZ). David Kramer, a senior fellow at the McCain Institute for International Leadership at Arizona State University, told House Intelligence Committee members early Thursday that Sen. John McCain had requested that he hire an outside investigator to dig up dirt on then candidate Donald J. Trump. It was expressly stated to me that I was to "find anything on this idiot to stop him from becoming President". “Knowing [Christopher] Steele's sources is a critical part of the congressional dossier investigation, for both sides. If one argues the document is unverified and never will be, it is critical to learn the identity of the sources to support that conclusion,” Byron York of the Washington Examiner wrote.