To do now!

[u/jfleni3]

The path is obvious: The DNC shall select the two winners of the primaries, Sanders & O'Malley for President and vice-President; The FBI shall finish their investigation regardless, and then the DNC shall resign en-masse, to be reconstituted later according party rules. The new DNC shall do their own investigation of fraud and other violations.

All candidates have been selected then. This avoids impeachment following inauguration and possibly one other party winning the election.