Willard prefers to look at the glass as being 1/4 full instead of 3/4 empty.
Another way to look at it—he has a very firm 25% who will vote for him come hell or high water, while the other 75% runs from one candidate to another like rats jumping off a sinking ship.
The primary basically boils down to just two candidates—Romney and non-Romney. Everyone including the candidates themselves has defined the election in terms of Romney. It will all come down to who if anyone is that elusive undecided vote.