This was an inter-agency intelligence inspector who found them, too, not Trey Goudy or other House GOP wingnuts.
Blame the Obama administration:
A spokesman for Mrs. Clinton’s campaign released a brief statement on Twitter, saying, “Any released emails deemed classified by the administration have been done so after the fact, and not at the time they were transmitted.”
And, there could be plenty more sparks, if not a full fire. Four emails sounds like small beer, eh? Those four came up in a spot check of just 40 emails.
That said, this probably isn't all that much of a big deal. Showing that a big government bureaucracy IS indeed a problem at times, the Department of State has been retroactively classifying some of them.
On the PR side, though, we're in another world. Few more nicks for Clinton.