Primaries are internal party elections that determine what candidate a party will support for presidency. In US generally speaking the Democratic Party primaries are open or semi-open, so every voter can participate.
For example, in lasr Dem primaries approximately 10 million people vited for Bernie Sanders, 2 for Elisabeth Warren, and 20 for Biden, which amounts to less than 20% of registered voters.

The primary every congressional district has. The right ran some crazy fucks against some well established right wing politicians so where is the left’s version of this.

Everyone hung up on the presidential primary is failing to heed our own advice to the people who vote for a third party as a protest against the Democratic Party.

The one that exists in the argument but not in reality. Keep up. It’s straw man season