Why did Obama oppose Iraq war?

Sen. Obama maintains he used good judgment in not voting for the war; however, he never identifies what the judgment was based upon. What were his reasons? Did he know:

1. There were no weapons of mass destruction?

2. Al-Qaida was in Iraq and ready to fight against us?

3. He doubted we could defeat the Red Guard and depose Saddam?

4. There were others ready to resist us?

5. Other reasons not specified?

His answers could justify his position if he would identify them.

Watt Curran

Rolling Meadows