Silver now realizes that if Trump is the nominee, his career as a a political prognosticator is over. He's bet the farm on this. I feel sorry for the man.
He's been very un-Silver this cycle. Usually his predictions are based on hard data, but he seems to have suddenly developed delusions of being a political analyst, rather than a statistician.
Fortunately he's had the good sense to expand his enterprise into sports and other areas.
He started analyzing baseball (the Baseball Prospectus) and then went to analyze politics. Just to set the record straight on him.