While Democrats and Republicans debate just how to deal with Iran over Iraq; diplomacy, sanctions, or military force, Iran has made up their mind on how they choose to handle it. Iran prefers to use the 107 mm missile style of ‘diplomacy’.
Iran uses diplomacy as a way to buy time to help insurgents in Iraq by supplying more weaponry and military training to kill Iraqis and coalition forces. It’s the same rope-a-dope they employ over their nuclear program with the United Nations. The debate in the US should be what kind of military force should be used to fight back.