It was a surprising statement from Attorney General Pam Bondi as the Trump administration promises to release more files from its sex trafficking investigation of Jeffrey Epstein: The FBI, she said, was reviewing “tens of thousands of videos” of the wealthy financier “with children or child porn.” The comment, made to reporters at the White House days after a similar remark to a stranger with a hidden camera, raised the stakes for President Donald Trump’s administration to prove it has in its possession previously unseen compelling evidence. That task is all the more pressing after an earlier document dump that...