On one hand are the Syrians and Iranians who have too much at stake to let their lackeys off the hook, and the Americans who desperately need a measure of local success to show for all their troubles in Iraq.
Ghanem would have been an ideal candidate; he could have been presented as “compromise” that surrenders nothing from March 14th, but against whom
And any straight refusal could lead to confrontation, for which they are all still not fully prepared. So they all temporize and buy time, hoping that either conditions will change to their advantage, or that the other side will “blink first”.
Since this all comes to a head in the presidential elections, they are likely to keep postponing the reckoning. For now, the repentiti appear determined to postpone the inevitable. By the formal rules of the democratic game, they can postpone till November. Chances are that they will.