2010 is interesting. I think that was when they decided they have to really go scorched earth on the cheating. The have the cheating baked in now to the point even a 6-8% lead is not enough. Every minute that passes reduces the chance we are getting the House. If the rats get the House HR1 passes and that is means permanent rat control of both.
Nowhere is this more obvious than the decision to campaign heavily (and raise lots of money) in 2010 and 2014 on a foundational promise to repeal ObamaCare. I truly believe the Republican Party leadership was caught completely off guard after the 2016 election when the party ended up controlled the White House and both houses of Congess ... because they were suddenly in a position where they COULD fulfill campaign promises that they never had any intention of fulfilling.