43%

Ouch that's gotta hurt. From Pew:

Public support for war in Iraq has been unaffected by the murders and desecration of the corpses of American citizens in Falluja. However, continued turmoil and violence in Iraq may be taking a toll on President Bush's approval ratings. More Americans now disapprove of the way he is doing his job than approve, though by only a slight margin (47% disapprove vs. 43% approve). Just four-in-ten approve of the way Bush is handling the situation in Iraq, his lowest rating ever and down from 59% in January. Bush's evaluations on other issues ? the economy, energy and even terrorism ? have fallen as well. And by a wide margin (57% to 32%) the public does not think he has a clear plan for bringing the situation in Iraq to a successful conclusion.