The last thing sHrillary wanted was to contest that election and have what little vote stealing that occurred to be exposed.
The massive Trump vote this year forced the Democratic vote-stealing machine to pause, regroup, and go into overdrive.
It is the sheer number of votes that they had to generate/steal/switch to overcome Trump's legitimate votes that will (hopefully) be their ultimate downfall.
Precisely! They just didn’t cheat enough in 2016. Challenges were far more likely to expose their cheating than anything the Trump campaign or RNC might have done.