He was monitoring the situation - and did nothing? That's as damning as saying he was sleeping. That's my point. Nothing was done to help those people. Was he monitoring and doing nothing, or was he otherwise occupied? It focuses everyone's mind on his most important failure, and on Hillary's most important failure. The famous commercial about the 3 AM phone call comes to mind when you think about the hours during which the diplomatic outpost was actually under attack.
Obama and Hillary had their chance to show what they were made of. An attack went on for hours, and they did nothing.
Yes it is awful to do nothing. But not impeachable.