Iraq is just like Vietnam except: We occupy Hanoi. We've captured Ho Chi Minh.
The North Vietnamese have just held a free and democratic election. The North Vietnamese are working on a new constitution. Yes, Iraq is just like Vietnam.
Add into this disparities in troop deployment levels and number of casualties and you begin to see that Iraq/Vietnam comparisons are little more than empty rhetoric put forward by empty-headed partisans more interested in political point scoring than productive debate.