How do you ask a man to be the last man to die for a mistake? That haunting question, posed by John Kerry to Congress when he was a discharged Navy lieutenant in 1971, helped to slow, and eventually stop, a pointless, unpopular war in Vietnam. That question, in part because Kerry declined to pose it anew when he was a presidential candidate in 2004, has yet to slow the unpopular war in Iraq, if anything a more massive US strategic blunder than the Southeast Asian venture. But the question unmistakably haunts the senators who shuffle before the cameras to defend or denounce the planned “surge” of 21,500 additional American soldiers into Iraq as part of the White House’s latest ploy to postpone defeat.