By now you have probably noticed the significant decrease in Russia stories in the mainstream media. You've also probably noticed the increase in attacks on Mueller and his "independent" investigation. This ls all by design. The media has stopped talking about Russia so when Mueller's investigation drops its bombshell (which should be this week, most likely) it will hit much harder as people have let their guard down once again regarding Russia stories. For a while, people were tuning it out like noise.
The attack ads are to prepare people for the result, and the fact that it is being run by people with an obvious agenda.
The question is how will this play out? The Democrats will see it as a win, but the legitimacy of the finding will be called into question.