Remember the lesson learned by Pres. Bush I that he told to Pres. Bush II?
If you go for it, don't stop until it is finished!
This advice came in admission that he blew it when he stopped chasing Sadam, and gave him the chance to not only survive but to build back up and retaliate. Lots of political crap can be thrown in here, but the lesson goes all the way back to the school yard where most of us learned not to start what we weren't committed to finishing.