but they don't kill him - and its not like he is in hiding - he could be killed at any time, but isn't. he could be sent a message at any time by knocking off one of his "lieutenants" each and every day until he got the message, but that doesn't happen either.
and that tells you what the problem is.
The problem with using more force is political. The current Iraqi government won't let us attack Ramadi or go into Sadr City.
The time to go on the offensive was before we got ourself locked into a government where an attack on any faction threatens to collapse that government.
The appeal of the national salvation government idea is that the gloves could come off.