things they're saying, you've got to be concerned. >> tucker: not the first time they have a lot lost communications central to an investigation. you have to remember how 24,000 emails were accidentally deleted somehow, that hillary clinton's deleted emails. tom, my impression was, and our cyber security guys are always saying, if you write it down digitally, it never goes away. why is that not true for federal documents in these investigations? >> it is only true if it is convenient to withhold information from investigators and the american people. in the case of lois lerner, they told us, we can keep some of her emails. it turns out, there were backup tapes, we ended up getting a lot of those. with hillary clinton, they said, well, there's nothing to give you. turns out, she had them all, tried to delete half of them, and we now are getting emails