The party's left wing had pushed for the changes, which now have official approval.
The Democratic National Committee’s changes aim to heal the lingering divisions of the 2016 presidential primary.
The Democratic National Committee votes Saturday on a proposal to diminish the power of superdelegates at party conventions.
The controversial system has come under criticism from progressives.
Bob Mulholland has no direct proof of Russian meddling in Democratic Party deliberations, but he remains suspicious.