The political class is seriously underestimating the impact of Hillary Clinton’s email controversy. They see it mainly as a problem of public opinion and electoral politics, where it has been increasingly costly but not yet fatal. The political damage—the drip, drip, drip of revelations—has been bad, but there is worse to come.
Hillary Clinton’s big problem now is legal, and it could well be insurmountable politically. Here’s why. Once a “political” issue finally moves into the legal system, as the Clinton email server has, it moves forward with an independent logic. That logic will slowly ensnare Secretary Clinton.