Is the Iraq surge working?

WaPo's Kagan writes:

Leading journalists have been reporting for some time that the war was hopeless, a fiasco that could not be salvaged by more troops and a new counterinsurgency strategy [Wrong, asshole. It was leading liberal journalists. -Ed.]. The conventional wisdom in December held that sending more troops was politically impossible after the antiwar tenor of the midterm elections. It was practically impossible because the extra troops didn't exist. Even if the troops did exist, they could not make a difference.

Four months later, the once insurmountable political opposition has been surmounted. The nonexistent troops are flowing into Iraq. And though it is still early and horrible acts of violence continue, there is substantial evidence that the new counterinsurgency strategy, backed by the infusion of new forces, is having a significant effect.

Some observers are reporting the shift. Iraqi bloggers Mohammed and Omar Fadhil, widely respected for their straight talk, say that "early signs are encouraging." The first impact of the "surge," they write, was psychological. Both friends and foes in Iraq had been convinced, in no small part by the American media, that the United States was preparing to pull out. When the opposite occurred, this alone shifted the dynamic.

As the Fadhils report, "Commanders and lieutenants of various militant groups abandoned their positions in Baghdad and in some cases fled the country." The most prominent leader to go into hiding has been Moqtada al-Sadr. His Mahdi Army has been instructed to avoid clashes with American and Iraqi forces, even as coalition forces begin to establish themselves in the once off-limits Sadr City.