The real dirty little secret is Saddam wasn’t going to live forever and no one knows what Iraq or even the Middle East would look like today if we had elected Romney or McCain.
Don’t let the hindsight blind you to far into the future or the past. Obama dissed a lot of the groundwork laid by Bush in these matters. And then Obama thought he could community organize an Arab Spring and play both ends against the middle.
All legitimate points, though I don’t know why a military campaign to topple a government in a sh!t-hole like Iraq with serious religious/ethnic divisions would be considered “groundwork” for anything except chaos and dysfunction.