This is very troubling, for me as an up-till-now-anyway Hillary supporter. Time to look at this seriously.

The Obama administration confirmed for the first time Friday that Hillary Clinton's unsecured home server contained some of the U.S. government's most closely guarded secrets, censoring 22 emails with material demanding one of the highest levels of classification. The revelation comes just three days before the Iowa presidential nominating caucuses in which Clinton is a candidate.

This may not be totally damning yet:

The Obama administration confirmed for the first time Friday that Hillary Clinton's unsecured home server contained some of the U.S. government's most closely guarded secrets, censoring 22 emails with material demanding one of the highest levels of classification. The revelation comes just three days before the Iowa presidential nominating caucuses in which Clinton is a candidate.

Maybe just a wrist-slap:

Possible responses for classification infractions include counseling, warnings or other action, State Department officials said, though they declined to say if these applied to Clinton or senior aides who've since left the department. The officials weren't authorized to speak on the matter and spoke on condition of anonymity.

But I don’t see how the news doesn’t impact the coming caucus.

I have to say, seeing Bernie talk to the press after his meeting with the President this week, I thought he looked like he had seen a ghost. I think the President may have warned Bernie that some very big, bad news is coming for Hillary. He is her opponent, but they are also from the same party, and I think he would have some compassion for her if the hammer of an indictment were coming. This is admittedly idle speculation, but I haven’t been able to get the look on Bernie’s face that day out of my head.

UPDATE: The campaign responds: