People need to decide if the DNC is so powerful and controls voters’ minds so much that endorsements from higher up make this much of a difference — or if they’re so weak & feeble that they must simply be challenged in primaries and we’ll have stronger candidates in the general. Which is it?
Most people have no idea what the DNC is, or what they do and don't do. They always think the DNC, DCCC, and DSCC are the same thing. Then they confuse all these three with local and state parties. But yeah, the expression "all politics is local" exists for a reason. It's consistently true.