War with Iran was not possible, and the republicans know it better than any one, most of them are nationalist warlords. They do not have the legitimacy to sanction in Iran. Again if they come back the old deals get activated and they set back. Moreover international consensus over Iran's sanctions would break. In practice republicans have always served Iran and the worst damages have been inflicted by the democrats. If Obama goes for a short time there would be strong rhetoric, but then quickly things would set back to the condition of 2008 which was enough better than the current condition.
PLO official: Reports about Abbas' resignation from political life very premature (Haaretz)