Excuse me, the democrats didn't know of the Russian interference. Obama got briefed but decided to not disseminate the information till after the election. If this was revealed and Clinton won, Obama would be in the hot seat. Generally most polls had her winning. Even Trump thought he would lose. Things turned around wildly after the so called new e-mail information was published and Comey said the FBI was looking in to it. Later confirming it was nothing but it came a little too late. Many voters probably changed their vote, hence the unexpected win by Trump. Who's to say what the outcome might have been if Comey did not announce the "new e-mails".
Just stay cool till after the investigations are over. Stay tuned. My take is no matter what the investigations into Russian meddling would have surfaced. This is too critical to let it pass. As Cheney stated, this could be an "act of war".