The need for a scapegoat to blame for Hillary Clinton's snatching defeat out of the jaws victory also played a role; as did the need for the Military-Industrial-Congressional-Intelligence-Media-Academia-Think-Tank complex (MICIMATT) to keep front and center in the minds of Americans the alleged multifaceted threat coming from an "aggressive" Russia. (Recall that John McCain called the, now disproven, "Russian hacking" of the DNC emails an "act of war.")
But that was then. This is now.
Though the corporate media is trying to bury it, the Russiagate narrative has in the past few weeks finally collapsed with the revelation that CrowdStrike had no evidence Russia took anything from the DNC servers and that the FBI set a perjury trap for Gen. Michael Flynn. There was already the previous government finding that there was no collusion between Trump and Russia and the indictment of a Russian troll farm that supposedly was destroying American democracy with $100,000 in Facebook ads was dropped after the St. Petersburg defendants sought discovery.