In Time's September 17, 2007 edition, Dan Neil writes:

" ... (Robert) McNamara, who became President Johnson's Secretary of Defense and refused to recommend withdrawing from Vietnam, even though he knew a lemon when he saw one."

In September 2007 Bush and his Republican backers refuse to recommend withdrawal even though they know what a colossal mistake it was to launch the Iraq War.

Only 4 percent in a recent Zogby Poll think we should stay in Iraq.  These respondents recognize that the war was a disastrous mistake.