"If you succeed, you will divide Iraq into three parts," he said.
Dividing Iraq would also harm regional stability and the war on terrorists.
Dividing Iraq, however, is virtually certain to make things worse.
Why does nobody talk about the most rational course of action: dividing Iraq?
Biden was instead a leading advocate for dividing Iraq into a loose federation of three ethnic states.
Attacking from the north would also open a second front aimed at dividing Iraq's best trained and equipped forces.
The answer is easy: it would likely divide Iraq into as many as 18 small feuding states.
"Bad people used this incident to divide Iraq on a detestable sectarian basis."
President Hussein divided Iraq into four administrative regions in 1998.
"We believe that implementing this law in its present form will be a prescription for dividing Iraq."