First of all, the outsized expectations for the talks stemmed from the publicly stated desire of American and Iranian presidents’ administrations to reach a comprehensive agreement. For Hassan Rouhani and Barak Obama, the formal settlement of the nuclear issue was and is a question of personal prestige. For the Iranian president, a deal would mean the fulfillment of his main election pledge. This, in turn, would strengthen his chances of being reelected for the second term. As for Rouhani’s American counterpart, he probably believed that a nuclear settlement in Vienna would improve his mixed diplomatic record. Apart from that, the men could also hope to undermine the positions of U.S. and Israeli hawks. Finally, a nuclear deal would open up a number of options for dialogue and, in theory, cooperation between the countries on other regional issues such as Afghanistan, Iraq, and Syria.

Yet, presidential resolve was not enough to make negotiations in Vienna successful. Although both sides were eager to reach a deal, neither Iran nor the United States was ready to make the concessions necessary to come to an agreement. The failure of the talks can, in part, be explained by the existence of very strong opposition in both countries to any deal that would involve compromise. In the Islamic Republic, this opposition is composed of conservatives who see any concessions made to the Americans as Iranian defeat, as well as members of the Iranian elite who profit from the current sanctions. Ali Khamenei, the Supreme Leader of Iran, could leverage the situation in the favor of the president. However, he was very cautious, leaving Rouhani out on a limb. Rouhani’s success or failure to reach an agreement with the P5+1 group would not affect the political positions of Khamenei: in either case, the president would be the scapegoat.

Obama’s position was and, still, is even weaker. Given his low popularity, the American president lacks the political capital to make any substantial concessions to Iran. Any initiative will inevitably face direct opposition from Congress, as the anti-Iran lobby will portray any concession as capitulation to the Iranian regime. Initiatives that do not require the involvement of U.S. legislators will probably be less appealing to Tehran because they will have little to do with easing the sanctions regime.

However, the experience gained in Vienna may be useful in future talks. The last meeting in Austria clearly demonstrated that the main sticking points for Tehran and Washington are not only related to the technical details of the agreement (such as the number of centrifuges that Iran will be allowed to keep or the information about its alleged military program). In order to make the further negotiations effective, both Obama and Rouhani need to find a way to achieve a consensus of support for their actions within their own political establishments.

Nikolay Kozhanov is a senior lecturer in political economy of the Middle East at the St.-Petersburg State University and an expert of the Institute of the Middle East (Moscow).