I have been waiting for this to show up in a more prominent way and now it has. The more interesting question is whether it matters. Obviously it does in some sense, since the Friends of the Democrats (ie the mainstream media + social media) have done all they can to prevent any of it becoming an election issue. Still, there is this.
The three tweets are from here: President Trump: Bidens Are ‘Grifters,’ ‘Crooks’. And so they are. But for a Democrat, it does not appear to matter. These people give democracy a bad name.