Shorter answer.
The Democrats won, so there was no need for the party and the media to unleash this weapon. That's all.
Believe me, had it been the reverse by exactly the same margins, voting fraud would have been the story for months.
The same machines and methods were used in mostly all the same places, many with the same issues. Same for registration and other problems. But the Democrats won, so the election, by definition, was fair.
The obvious corollary to the Third Law of the Left is that no Democrat ever won an election unfairly.
The flap in the 13th district in Florida was simply because the Republican won a tight race.
The good news is, now that the "right people" won, I don't have to sit through years of people whining about stolen elections.