When CBS, ABC, and now NBC cover Benghazi on the same day, especially going into a talkshow circuit weekend, you know it's not being ignored.
Add to that the thing about the IRS paying special attention to Tea Party type groups, which has been blamed on "rouge agents". Sounds like plausible deniability to me.
Add to that the further stepping back of this "red line" or "pink line" or "imaginary line" on action in Syria, and El Jefe is having some trouble, no matter if the DNC or Dem voters want to acknowledge it.
With regards to impeachment...not going to happen. Someone at State will fall on their sword first.