The Dems who don’t like Hillary and find Sanders too socialist have already decided to go Trump. This is an open primary and the ARG poll shows very few undecided voters, unlike the previous polls who had from 13-22% undecided. They are breaking for Trump.
That's a great observation.
Trump has been claiming, while out on the stump, that the anti-Trump ads don't seem to have much effect; and that endorsements of his opponents by the state dignitaries likewise don't appear to have much effect.
The world will have a handle on it in about 30 hours. This primary election season is wild. Turnout is high, and it doesn't appear to be affected by the contest being polled as "runaway" rather than "close."