Begs the question, why are they working so hard in Indiana??
To keep up the appearance of being qualified, interested, and viable in a contest against the eventual DEM candidate. The only process they are dismissing as unimportant or a charade is the results of the primary vote.
Of course, they would reverse that position in a heartbeat if they won the primary vote. Not saying that's likely, just that the stated position is a reaction to events. Leading by following.