Grim over at Blackfive says it better than I could:
Read the rest. It's worth it.
Things are changing in Iraq. We're seeing the first waves of the gravity well we're building there, a well whose pull extends far beyond the borders of Iraq itself. It's already strong enough to begin to exert its pull on the United Nations, which is suddenly willing to hedge its bets on success; and Sens. Durbin and Levin, who want to hedge theirs. I'll say they are all welcome to do so. If we can ask political reconciliation of the Iraqis, we can ask it of ourselves. Anyone who wants to join us now in trying to help build success in Iraq, and stand against those who fight by murder and war crimes, is welcome aboard. I don't care why they come, what their motives are, so long as they are willing to join the fight.