[dragonwriter]

> The DNC had a system to allow rigging,

No, it didn't have a “system to allow rigging”, beyond partisans of one candidate being in near-total control of the DNC.

They did have and leverage a system which helped promote a public inevitability narrative for a candidate that sewed up institutional support early by way of superdelegate voting rights, which led to then being included by media in delegate counts, reinforcing an artificial image of momentum which is demonstrated to drive subsequent voting behavior. This was dismantled when superdelegates voting privileges were reformed.