Eric Holder’s intercession on behalf of fugitive Marc Rich is so inexplicable that he has always viewed ignorance as his best defense. It’s as though Holder believes that a deputy attorney general looks better for having remained studiously unaware of critical facts in a criminal case before throwing his weight around. But that’s Holder’s story, and he’s sticking to it: even if it turns out not to be true. Holder is President Obama’s choice to become attorney general. That means the Rich case is a big problem for him today—just as it was in 2001, when an outraged Congress demanded...