As time goes by, we're gradually learning more and more about what was in Inspector General Michael Horowitz's report.
We all know that John McCain was no fan of Donald Trump's. Likewise, Trump was no fan of McCain. But President Trump never stooped to the level that we just learned that McCain stooped to.
If President Trump has known about this for a long period of time then it's no wonder why he was no fan of his.
There has been speculation for some time that McCain was involved in the Steele Dossier against the President and actively worked toward trying to prevent Trump from ever becoming president. The IG report revealed that McCain funneled several Trump-Russia documents to the FBI after Steele’s termination from the elite spy agency to help keep the "progress" moving.
According to Breitbart,
Late Senator John McCain provided disgraced former FBI chief James Comey with five separate reports from Christopher Steele that the FBI didn’t previously possess related to unsubstantiated allegations of collusion between Russia and President Trump’s 2016 campaign, the Justice Department’s recent Inspector General report revealed.
There have long been questions about why it was necessary for McCain to pass Steele’s anti-Trump dossier to Comey on December 9, 2016, several weeks after the November 2016 presidential election. By then, Steele had already met numerous times with FBI agents to provide them with his controversial reports. Steele, however, was terminated as an FBI source in the fall of 2016 because he spoke to the news media.
The IG report discloses that McCain gave five new Steele reports to Comey that the FBI did not previously possess, showing that McCain served as a conduit for Steele’s information to reach the FBI even after the British ex-spy was formally cut off as an FBI source.
It is not clear whether McCain knew at the time that Steele had previously been terminated as an FBI source.