That's a particularly ripe load of bollocks, though. It's a feeble echo of Kipling's "white man's burden" -- itself a craven apology for empire. Here is Sharon Smith on counterpunch, full text linked above.
For more than a century, the U.S. has claimed each time it invaded another sovereign nation that it did so selflessly, shouldering the moral responsibility of "civilizing" a backward population. This process became widely known as "the white man's burden," after Rudyard Kipling's 1899 poem of the same name, which described the conquered populations as "your new-caught, sullen peoples, half-devil and half-child."
Kipling's poem was written to celebrate the 1898 U.S. invasion and occupation of the Philippines, which killed well over a half a million civilians during the next several years. The U.S. government crushed the Filipino insurgency--and refused to grant independence to the Philippines until 1946.
In Iraq, the U.S. has managed to kill a similar number of Iraqis, but failed to crush the resistance. The Washington establishment (minus the increasingly isolated and delusional Bush and Cheney) has finally concluded that the Iraq war is "unwinnable," and the imperial endgame is beginning. Commitments to "bipartisanship" and "compromise" are already echoing through the halls of Congress, as Democrats and Republicans unite to avoid further humiliation and to salvage what remains of U.S. imperialism's long-standing aims in the Middle East.
Democrats and Republicans have joined together to take aim at the ungrateful Iraqi population, who apparently fail to appreciate the U.S.' selfless efforts to impose "democracy" through military occupation. On this point, the two parties are indistinguishable.