Obama says biggest mistake was having no post-Qaddafi plan for Libya. No, his biggest mistake was hiring the war-mongering Hillary Clinton as Secretary of State. Libya was a planned failed state: planned by Clinton, Feltman, James Steinberg, Nuland/Kagan, and Bernard-Henri Levy.
WITH LOTS OF HELP FROM FRANCE & BRITAIN
http://www.bloomberg.com/politics/articles/2016-04-10/obama-cites-lack-of-day-after-plan-in-libya-as-biggest-mistake