Actually, it was bushie boy's choice.More than half of Democratic Senators voted for the use of military force in Iraq. Without them, the Iraq War would have never been sanctioned.
As someone else put it:
The War in Iraq was only approved because of a majority Democrat vote in the Senate. The Democrats then turned around and called it "Bush's war". It's intellectual dishonesty.
You people obviously don't know the US Constitution.
But then, that's nothing new.