Primaries are not in public hands.

You should research before you comment.

Today, the states hold considerable power in determining the rules for all elections that happen within their borders. In general elections, states decide which method of voting will be used, whether felons can vote, and whether voters must show some form of identification at the polls. In primary contests, state parties run caucuses, but state governments conduct primaries.

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State Primaries and Caucuses for the Presidential Elections

State primaries are run by state and local governments. Voting happens through secret ballot.

Caucuses are private meetings run by political parties

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You learned something today, congrats and you're welcome. I fully expect you to retract your erroneous comment (you won't).

When the former chair of the DNC says that Clinton had the DNC under her control

Since we're quoting Donna Brazile; I found no evidence Democratic primary was rigged