“Too big to rig” is almost Madisonian in principle.
Why concede 2020?
We can’t have TWO presidents at the same time.
Can we?
Because Joe Biden is President now.
If Biden is POTUS, then Trump is not the POTUS.
Being President to not being President involves conceding the loss.
The Democrats were successfully able to rig a “smaller” presidential election, but not one that is “too big.”