Russia has a strategic and economic relationship with Iran
Russia has a significant strategic and economic relationship with Iran that it is trying to maintain after the nuclear deal. To begin with, Russia has been a significant military and economic partner with Iran, providing nuclear power expertise and selling weapons to Iran. Russia supports the current sanctions regime but is looking forward to its expiration. In addition, Russia has long looked to use Iran to counter-balance against the U.S. in the Middle East while at the same time not antagonizing Iran to escalate its support for Islamic militants in Russian territories.
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It may be possible also to convince Moscow to reconsider its support for the Iranian government and its nuclear program. Bushehr is the pretext for Iran's entire enrichment program. If Moscow were to withdraw its support—and its engineers—the Iranians could not ready the reactor for operation and would have no civilian reason to keep spinning their centrifuges. U.S. diplomats should send the message to Rosatom that, over the long-term, they would be much better off staying out of Iran. If the UN Security Council were to ban nuclear cooperation with Iran until it was in full compliance with its Non-Proliferation Treaty Safeguards Agreement, then it might provide cover for Rosatom to cease its work in Iran. Absent such UN Security Council cover, the firm may fear that any withdrawal from the Iranian market would brand them an unreliable partner as they bid on other states' nuclear programs. So long as Rosatom persists in its Iranian business, it risks soiling its commercial reputation at a time when it can compete with Westinghouse and AREVA.
Another mistake the United States made was failing to get Russia on its side. Iran cannot be politically and economically isolated without Russia fully cooperating for three reasons. First, Russia has widespread economic ties with Iran. Second, the two rising powers, China and India, refrain from participating in sanctions on Iran because both have interests in the country. Yet, both tend to hide behind Russia at the UN and other forums. As long as Russia does not join sanctions against Iran, China and India will not either, despite U.S. pressure to do so. European countries, such as France and Italy, also feel that halting their investments in Iran will be impractical.Without Russia, therefore, the United States will have little success. And third, Russia is the supplier of the nuclear reactor in Bushehr, indicating that Iran needs to continue ties with Russia.
Meanwhile, Russia will continue to use the P-5 diplomatic process (in side and outside the UN) to push forth compromise proposals that in volve enriching and/or storing fuel on Russian soil as a way to give Iran a symbolic claim to autonomy but also giving the West what it wants on nonproliferation. As part of such a strategy, it will still oppose tougher, “crippling” sanctions toward Iran in the P-5 diplomatic process as part of a larger position that honestly does not consider a heavily monitored, conditioned enrichment program to be a strategic threat (i.e., Russia will continue acting on its analysis that “zero enrichment” is not feasible and, in terms of curtailing threats, is not even needed). More expansively, in terms of geopolitics beyond the nuclear portfolio, Russia can be expected to continue to curtail US and NATO geopolitical and geostrategic influence by cooperating with Iran (as well as China) on Caspian Sea, Central Asian, Caucasus, and South Asian issues. It will undoubtedly increase strong bilateral trade links with Tehran, providing Iran with consumer goods, foodstuffs, and oil and gas equipment as well as assistance on infra structural projects. In the Gulf conventional military context, it will keep supplying important niche military defense capabilities such as ballistic missile technology and contracts for a range of jet fighters, helicopters, submarines, tanks, and air-defense missile systems to Iran. Finally, the delays caused by Stuxnet aside, Russia will help run, maintain, and service the Bushehr nuclear power reactor as a part of Iran’s nuclear infrastructure that does not pose the most serious danger of weaponization, including supply of needed feedstock.27
The position of Russia and China, two permanent members of the U.N. Security Council, is that they will impose only those sanctions required by U.N. Security Council resolutions. Russia earns significant revenues from large projects in Iran, such as the Bushehr nuclear reactor, and it also seeks not to provoke Iran into supporting Islamist movements in the Muslim regions of Russia and the Central Asian states.
In August 2014, the two countries reportedly agreed to a broad trade and energy deal which might include an exchange of Iranian oil (500,000 barrels per day) for Russian goods. That deal could potentially violate the JPA, if implemented.32 Russia is an oil exporter, but Iranian oil that Russia might buy under this arrangement would presumably free up additional Russian oil for export. Russia and Iran reaffirmed the deal in April 2015, following the April 2, 2015, framework nuclear accord. Also in April 2015, Russia lifted its own ban on delivering the S-300 air defense system that it sold Iran in 2007 but refused to deliver after Resolution 1929 was adopted—even though that Resolution would technically not bar supply of that defensive system. The Russian announcements in April appeared part of an effort to ensure that Russia has an advantage in access to Iranian markets if sanctions are lifted as part of a comprehensive nuclear deal.

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