The Register endorsed Hillary, so you know it must be bad if they are calling for an audit. This is very uncharacteristic of the Register.
The RNC and the DNC have designed the Caucuses to do two things: 1) to test the Organization of individual candidates, and 2) to winnow the field.
Both of those goals have been met.
Do I suspect the D results were rigged? Do bears poop in the woods? It is a time honored trick on the D side to withhold results from a few big precincts so they can “find” unreported ballots. It happened Caucus Night, but the news media isn’t wise to this trick and only mentioned it in passing.
It does not matter who votes. What matters is who counts the votes...J. Stalin (patron saint of DNC)
I believe this is an approved DNC tactic. "Landslide Lyndon" aka LBJ and Cuyahoga County, Ohio are two instances that come immediately to mind.