He is one of the few--I have heard others, but not many--who debunk the myth of the late-breakers going for the challenger in the Prez race--they go for the challenger in the state-level races, perhaps, but not in the Prez.
They apparently don't even go to the challenger in state and local races. That's a myth started by someone who wanted you to believe something that's not true. It's sort of like me saying, "Let's have lunch in Lexington, the beautiful capital of Kentucky." Yes, Lexington, Kentucky is a beautiful city, but Frankfort is the capital of Kentucky, not Lexington.