Obama, at the suggest of Secretary Clinton and the French president, directed the overthrow of Qaddafi. Despite the fact that Qaddafi had already turned his nuclear arsenal over to the US. Plus, bitter experience has shown that overthrowing one such dictator either, releases chaos or someone worse takes over.
Observe the immediate effects. Libya in chaos. Most other nations evacuate their embassies -- not the US. US embassy and other buildings are left with only small security details despite repeated requests for more guards. The ambassador is murdered, as well as, other personnel. Obama, knowing, repeatedly lies to the public blaming the violence on a film on the internet.
Long term effects -- other thug nations realize having a nuclear arsenal is an insurance policy against the US overthrowing their regimes -- North Korea and Iran keep planning their nuclear arsenals.
Obama and Hillary both examples of a dynamic combination of arrogance and incompetence.