Even if true, it is only a primary election.
The Sanders wing of the party wants to take out the Hillary faction.
That is what is going on here...
that’s the attitude that will get Republicans smashed in November...great economy, people making more money, blah-blah-blah...they (Republicans) best start the get the vote out machine now!!
This kind of turnout in the primaries might actually hurt the Democrats in the fall, if those turning up to vote are those furthest to the left - as with those pushing for a more liberal candidate than Feinstein in California. Probably won't hurt in California, but definitely could in other places.