Earlier this week state election officials said a check of a random sample of the signatures submitted showed the proposal to scrap partisan primaries fell about 10,000 short of the nearly 260,000 necessary. A big reason for this was the conclusion by Maricopa County Elections Director Karen Osborne that a large number in her sample were simply not registered to vote. Others signatures were struck because the information did not match voter rolls. But campaign spokesman Joe Yuhas said a review by his own staff tells a different story.