The 20% wouldn’t vote is huge. Will they split evenly when they finally decide or will they favor one over the other. Apparently, they are as much against the establishment as they are the anti-establishment. With such a broad choice already how could they want more?
My guess is they simply hate to be wrong.
That is probably the 20% who think DC is just fine the way it is now. The candidates they favor will hopefully be run out of DC after this election.