I had a DOE Q clearance for years. They searched everything i took in and out. There was no chance of taking anything out of the site. How is it that they can ? President, Vice President - Madam secretary. Whoever. Shame on them all.
I don't think anything has been planted. They've mentioned that all presidents have taken home confidential docs. I'd bet they could search all ex President's houses and find them. (not that they will)