Juan Cole takes a nuanced, balanced approach to analyzing the effects of the troop surge in Iraq:
For the first six months of the troop escalation, high rates of violence continued unabated. That is suspicious. What exactly were US troops doing differently last September than they were doing in May, such that there was such a big change? The answer to that question is simply not clear. Note that the troop escalation only brought US force strength up to what it had been in late 2005. In a country of 27 million, 30,000 extra US troops are highly unlikely to have had a really major impact, when they had not before.
Too bad the majority of the electorate won’t. Also some good comments over there.