Gideon Rose opposes the war in Libya but thinks we can't simply cut our losses at this point:
[E]ven though I would have argued against intervening in Libya, at this point I wouldn’t counsel simply pulling out. I would be torn between staying the course and escalating to win (that is, toppling Qaddafi). I suppose I’d favor trying the former for a few more weeks, hoping to get lucky, then moving to the latter as support for it increased through everyone’s frustration with the stalemate. But I would insist on a multilateral, preferably U.N.-sanctioned post-conflict stabilization and reconstruction effort to handle post-Qaddafi Libya, so the U.S. could step back as much and as quickly as possible.
Does this sound familiar to you? Yes, there are still 50,000 US troops in Iraq. Wars are like spending programs. Once started, they're bloody hard to end.