No, I think this one falls into the lap of the State Department. While Republicans did slash the budget, the allocation of the remaining funds is strictly the duty of the State Department. I think a simple risk assessment (Rag-tag loosely aligned militias, not all of which are friendly to US causes, have overthrown a stable, albeit murderous, dictator and the replacement government isn't strong enough yet to effectively enforce its power over the still-armed militias. We ought to reenforce our embassy with agents that are currently in low-risk areas elsewhere temporarily.) would have probably altered the events in a way more favorable.

/Again, I'm assuming that the Republicans were wise with their cuts.
//And that the funds weren't earmarked.