Just how serious is the FBI investigation into Hillary Clinton’s emails? Since the bureau doesn’t like to speak about it publicly, people have to judge from outside signs—for example, how many agents are working on the case. So when The Washington Post reported this week than there were 147 FBI investigators looking into whether any crimes were committed in the handling of classified material on Clinton’s private email server, and whether that server was hacked, it was a bombshell. Republicans exulted and Democrats felt a rising nausea. The story swept across cable TV and the web.