Despite a near-continuous rivalry that dates back to the 18th century, Moscow and Tehran have lately been drawn together by their shared antipathy to the U.S., their desire to combat Sunni jihadism, and their support for Bashar al-Assad in Syria, where the Russian military cooperates closely with Iranian and Iran-backed forces. Anna Borshchevskaya considers whether the U.S. could undermine the alliance between the two:

From Moscow’s perspective, the U.S. has been and will continue to be an enemy, no matter how hard any U.S. president tries to improve relations. Putin needs the U.S. as an enemy to justify domestic problems at home and he sees the current geopolitical order, anchored by the U.S., as disadvantaging him. Nothing short of a rearrangement of that order will satisfy Putin. [He thus] needs allies who share this worldview.

President Trump expressed two contradictory policies during his campaign: being tough on Iran and improving relations with Russia. These two goals are incompatible because Vladimir Putin wants a partnership with Trump in Syria, but Syria is where Putin is most closely allied with Iran. In order to push Iran and Russia apart, Trump needs to resolve this contradiction. The recent Syria peace talks in Kazakhstan only brought Russia and Iran closer together. . . .

In the long term, [however], Russia and Iran diverge somewhat on Syria. Iran perceives Syria as within its sphere of influence, which is not very different from how Putin views the former Soviet Union countries that he does not consider real states. Iran is interested in exacerbating sectarian divisions in Syria so that the Assad regime becomes an Iranian client-state with no independent decision-making. . . . The Trump administration could emphasize to Putin that Russian and Iranian interests in Syria are bound to clash in the future, and therefore an alliance with Iran can only go so far.

But most of all, the U.S. needs to be present in the region and regain its leadership position. Putin preys on weakness and has perceived the U.S. as weak for years. He stepped into a vacuum in the Middle East, especially in Syria, that was created by America’s absence. By taking an active role in the region, the U.S. would limit Putin’s influence, including his alliance with Iran.

Early Friday morning, Israel attacked military installations near the Iranian cities of Isfahan and nearby Natanz, the latter being one of the hubs of the country’s nuclear program. Jerusalem is not taking credit for the attack, and none of the details are too certain, but it seems that the attack involved multiple drones, likely launched from within Iran, as well as one or more missiles fired from Syrian or Iraqi airspace. Strikes on Syrian radar systems shortly beforehand probably helped make the attack possible, and there were reportedly strikes on Iraq as well.

Iran itself is downplaying the attack, but the S-300 air-defense batteries in Isfahan appear to have been destroyed or damaged. This is a sophisticated Russian-made system positioned to protect the Natanz nuclear installation. In other words, Israel has demonstrated that Iran’s best technology can’t protect the country’s skies from the IDF. As Yossi Kuperwasser puts it, the attack, combined with the response to the assault on April 13,

clarified to the Iranians that whereas we [Israelis] are not as vulnerable as they thought, they are more vulnerable than they thought. They have difficulty hitting us, but we have no difficulty hitting them.

Nobody knows exactly how the operation was carried out. . . . It is good that a question mark hovers over . . . what exactly Israel did. Let’s keep them wondering. It is good for deniability and good for keeping the enemy uncertain.

The fact that we chose targets that were in the vicinity of a major nuclear facility but were linked to the Iranian missile and air forces was a good message. It communicated that we can reach other targets as well but, as we don’t want escalation, we chose targets nearby that were involved in the attack against Israel. I think it sends the message that if we want to, we can send a stronger message. Israel is not seeking escalation at the moment.