http://theintercept.com/2017/03/16/key-democratic-officials-now-warning-base-not-to-expect-evidence-of-trumprussia-collusion/
The principal problem for Democrats is that so many media figures and online charlatans are personally benefiting from feeding the base increasingly unhinged, fact-free conspiracies — just as right-wing media polemicists did after both Bill Clinton and Obama were elected — that there are now millions of partisan soldiers absolutely convinced of a Trump/Russia conspiracy for which, at least as of now, there is no evidence. And they are all waiting for the day, which they regard as inevitable and imminent, when this theory will be proven and Trump will be removed.
Key Democratic officials are clearly worried about the expectations that have been purposely stoked and are now trying to tamp them down. Many of them have tried to signal that the beliefs the base has been led to adopt have no basis in reason or evidence.