Ted Kennedy is proving to be an embarassment to his party and to himself. Robert Byrd passed that point years ago. But their comparisons to Vietnam hold water in this regard - if we allow ourselves to treat this "uprising" as we treated a far more effective Tet Offensive 36 years ago, we will find ourselves having given the enemy aid, comfort, optimism, and a powerful recruiting tool.
Fortunately, neither our military nor our political establishment seems willing to let that happen.
UPDATE: Jared has a fine commentary on the actual differences between al-Sadr, Mullah With a Deathwish, and the VC during Tet.