OK some deep thinkers there
If the United States continues to be bogged down in a protracted bloody involvement in Iraq, the final destination on this downhill track is likely to be a head-on conflict with Iran and with much of the world of Islam at large.
A plausible scenario for a military collision with Iran involves Iraqi failure to meet the benchmarks; followed by accusations of Iranian responsibility for the failure; then by some provocation in Iraq or a terrorist act in the U.S. blamed on Iran; culminating in a defensive U.S. military action against Iran that plunges a lonely America into a spreading and deepening quagmire eventually ranging across Iraq, Iran, Afghanistan, and Pakistan.
A mythical historical narrative to justify the case for such a protracted and potentially expanding war is already being articulated.