Last week’s Washington Post bombshell, the news that the Justice Department has given immunity from prosecution to the former State Department staffer who maintained Hillary Clinton’s “homebrew” email server, is forcing Mrs. Clinton and her apologists to alter their media strategy.For months it has been obvious that a serious criminal investigation of the former secretary of State’s reckless mishandling of classified information has been underway. Yet Camp Clinton has maintained that the government is merely engaged in a “security inquiry” that is focused on the physical server itself -- not a probe of criminal suspects. This has never made sense....