That article links to this timeline of accusations...which leaves out the one that turned out to be some right-wing blogger (who calls Bill O'Reilly getting fired a "scalping") complaining that one time Franken was a jerk about making sure she knew she'd lost an argument with him. It seems like people forgot about it since it was such a huge nothingburger, but the fact that it was piled on so quickly after Tweeden's claim is an important part of understanding why it was so obviously a ratfuck.
And speaking of ratfucks, I see the Atlantic article also leaves out the part where Roger Stone had advance knowledge of what was coming.