"Collusion, collusion, Russia, Russia, Putin, collusion, Russia all the things, collusion, red menace, collusion, former KGB, collusion." That's been the Democrat mantra for well over a year now. Trump is evil and is only in office because the Soviet Bear put him there. It's all nonsense. Hillary lost because she's horrible and her own party didn't want her to be the nominee - end of story.
However, if you've been paying attention, you probably suspect that Democrat claims of "Russian collusion" are part of their most famous long-term pattern. They always accuse Republicans of doing exactly what they themselves have done.