Now we know that the White House knew that odd fact but did nothing about it:
The White House will not allow the release of emails exchanged between President Barack Obama and Hillary Clinton from when she was secretary of state, a senior administration official said on Friday.
The emails may be withheld until after Obama leaves office under the Presidential Records Act, according to the White House, which governs public access to the president's records.
While the contents of the emails might or might not be of interest, their very existence tells us that the White House knew about the private email and yet did nothing to rein in their rogue cabinet member.