Quote from Magna:
I don't think they planted evidence to begin with because, given the intelligence they had, they genuinely expected to find huge vaults of the stuff. At this late stage, after having over a year to interview and search, and thousands of our sharpest people scouring the country and finding little/nothing, if anything is produced two things will inevitably happen:
1. People on the left won't believe it one bit, and assume it has been planted as a last-ditch effort to justify the huge cost in lives and money.
2. People on the right will immediately believe any bread-crumbs thrown in front of them and be ever-grateful that something, anything was found.