I don't follow. Whose idea is this? And I've never really cottoned to the phrase "losing the peace". What does it mean, exactly? IMHO this notion of "losing the peace" is part and parcel of the recent ongoing effort to re-define victory/success so that it's impossible for the U.S. to achieve it.
No, we won the war in Iraq. The idea now is to win the peace, i.e. do not allow dictatorships enslaving and killing millions of people to re-emerge like we did after WWII.
Meaning that we don’t want to lose the gains we made to the terrorists. The Iraqis are free now and will stay that way.