A sarcastic summary?
There's a "Stop Bernie at all costs" campaign, so the groomed heir is left unchallenged, and will "follow the script".
There's the "Stop Donald at all costs" campaign, because he hasn't been bought, and isn't following "the script".
Anyone think the system of lobbying and "lowest common denominator politicians" has evolved to the point where only 2 choices is insufficient to get a rational consensus?
The engineering term is, are the parameters sufficient?