"If the Americans don't withdraw, we will re-activate the Mehdi Army. At the moment their activities are frozen, but if the Americans stay, that will change.
"We are still the resistance and we can still hit their bases, troops and equipment as long as they are in Iraq."
American combat forces are necessary to keep differences in the political arena and to protect Iraq's borders. Without our presence, Iran could invade Iraq, Iran could instigate a civil war, or Iran could just exploit a civil war.
So naturally, Sadr--Iran's vicious little pit bull--opposes America's continued presence.
Defending Iraqi democracy and sovereignty will require taking down that living piece of Iranian-sponsored garbage. We've let him get away with three uprisings. Will he get a shot at a fourth?