The Obama administration had to expend considerable political capital in fending off attempts, during the recent Congressional review period, to kill the agreement to restrict Iran's nuclear program. As a matter of policy toward that program, such expenditure should never have been necessary; the strict limitations and scrutiny of the program that are embodied in the agreement are clearly better for U.S. interests than the absence of such limitations and scrutiny if the agreement had been killed. But the expenditure was required to beat back opposition to the agreement that was rooted not in any consideration of the merits of the agreement itself but instead in other reasons that opponents had to oppose the administration and to keep Iran isolated. It is not surprising, given how domestic politics tends to work, that since the agreement survived last month's Congressional gauntlet we have been seeing a sort of rebalancing of political accounts in which the forces opposing the agreement are being propitiated in other respects. Although the propitiation is understandable in terms of domestic politics, it is damaging U.S. foreign policy interests. It undermines the prospects for constructively building on the agreement to advance other U.S. interests in the Middle East, and it may even imperil the nuclear agreement itself.

The political rebalancing is manifested in an amplification of hostility toward, and threats against, Iran. All the negative things that were said about Iran in the course of earlier debate on the nuclear agreement are being said, across the political spectrum and across the different branches of government as well as in public discourse, with as much loudness as they were before. All the required mantras about the need to oppose the “nefarious” things that Iran supposedly is doing in its region are being recited as automatically as they were before. Every opportunity is taken to kick Iran in the shins verbally and to disavow any possibility of American friendship with it. These themes are apparent not only in the general rhetoric in Washington but also in draft legislation. This includes Senator Ben Cardin's bill for an “Iran Policy Oversight Act,” which includes almost nothing about building positively on the agreement but instead is mostly about expressing hostility and making threats, including the threat of reimposing sanctions on Iran.

None of this makes any sense if one goes beyond domestic American politics and considers what the agreement has or has not changed. It makes no sense as a response to a diplomatic accord in which Iran has committed itself to keep its nuclear program peaceful and has backed up that commitment by subjecting itself to unprecedented monitoring of, and limitations on, the program. The negativity would make much more sense if the Iranian behavior had been the opposite of what it really was—that is, if Tehran had walked away from the negotiations and, amid more threat-making of its own, had resumed expansion of an unrestricted nuclear program.

The negativity-infused political rebalancing jeopardizes the prospects for the United States advancing its interests in the Middle East through a more complete and unfettered diplomacy on several important issues in which Iran also has an interest. The security situations in, and political futures of, Syria, Iraq, and Afghanistan top the list of those issues, but there are other important topics as well, including broader questions of security in the Persian Gulf region. Building on the nuclear agreement means taking advantage of the ice-breaking effect of the nuclear negotiations, which moved away from a situation in which U.S. and Iranian officials were not even talking to each other, to conduct effective and mutually beneficial business on these other matters.

Notwithstanding earlier anti-agreement rhetoric to the effect that we should not expect Iran to become nice because of the nuclear accord, what is involved is not niceness. What is involved is Iran acting on behalf of its own interests—some of which parallel U.S. interests and some of which diverge from U.S. interests on each of the issues just mentioned. That is the sort of non-zero-sum situation that is the stuff of the normal give-and-take in normal diplomacy. And for the United States, building on the diplomatic breakthrough of the nuclear accord is less a matter of unshackling Iranian diplomacy than of unshackling its own diplomacy, and of availing itself of a full box of tools for pursuing its interests in the Middle East.

The amplified negativity and animosity toward Iran that emanate from the U.S. domestic political pot not only threaten to get in the way of a broader and more effective U.S. diplomacy in the region but also takes no account of the fact that the Iranians have domestic politics as well. The hostile vibes from Washington weaken the position of President Rouhani and those who are inclined to be part of a more constructive regional diplomacy, and play into the hands of unreconstructed hardliners who would be more content with Iran remaining an isolated rogue. The political dynamics involved, of hostility begetting more hostility and of hardliners in each capital helping the other's cause, are a threat not only to effective diplomacy on other topics but also to the nuclear agreement itself. Iranian hardliners who never liked the agreement will be eager to seize on anything that enables them to argue that all of Iran's concessions bought it nothing but endless enmity from the United States.

A major part of the U.S. political rebalancing act is a push to provide yet more U.S. assistance to regional rivals of Iran, which mainly means the Gulf Arab states and Israel. Again, there is no logic to this in terms of what the nuclear agreement did and did not change. Iran's placing of its nuclear program under additional restrictions and scrutiny does not make Iran more of a threat to anyone than it was before. Iran's becoming less of an isolated rogue and more of a normal actor in regional politics does not make Iran any more of a threat to anyone than it was before. And notwithstanding how heavily opponents of the nuclear agreement tried to rely on the argument that sanctions relief will give Iran a financial windfall that it will use to fund more “nefarious” activity in the region, that argument still is no more valid than it ever was—given how most of the funds in question are already committed to purposes where they have been frozen outside the region, how the needed uses for the funds include domestic economic development and strengthening Iran's international finances, and how there is no evidence that Iran makes its regional policy according to the balance in its bank account, no evidence that “nefarious” activity went down when severe sanctions were imposed, and thus no reason to expect that it will go up when the same sanctions are loosened.

The Gulf Arabs and Israel have their own reasons to try to hinder and isolate their Iranian rival, but these are not interests the United States shares and they do not involve genuine security threats to the countries concerned. The Arab states of the Gulf Cooperation Council already have clear military superiority over the Iranian armed forces. In the case of Israel, it has overwhelming military superiority over everybody else in the region, both at the conventional level and at the level the agreement with Iran was designed to address.

That superiority will continue even if the United States were not to lift a finger on Israel's behalf in the years ahead. A pattern nonetheless prevails in which the United States has given Israel $124 billion in no-strings-attached aid and continues giving it at a clip of about $3.1 billion a year, not counting hundreds of millions of additional assistance in the form of joint defense projects. The aid is being given to a state that is among the richest one-fifth of the countries of the world, as ranked by GDP per capita. That pattern ought to make every American taxpayer cringe, especially when reminded of budget-constrained cuts to programs for the benefit of Americans themselves. The pattern is cringe-worthy even without getting into questions of what sort of Israeli policies and practices the United States is in effect subsidizing. And yet there is talk today of increasing aid to Israel even further.

If policy could trump politics rather than the other way around, policy would take advantage of the political achievement of being able to get the nuclear agreement through Congress despite the huge effort to defeat it by the lobby that works on behalf of the right-wing Israeli government. The episode demonstrates that it is possible to defy the lobby on a matter on which it has pulled out all the stops, and still survive to tell the tale. A far-sighted and courageous response to this episode would seize the occasion to make several policy adjustments. One would be long-overdue rectification of the aid pattern just described. Related to that would be construction of policy toward Israel that would make the important point that no foreign government will be rewarded for behaving toward the United States the way that particular government behaved regarding the nuclear agreement, which was to do everything it could to subvert U.S. diplomacy and foreign policy, including through blatant interference in domestic U.S. politics. And another response would be to address, seriously and effectively and not just with wrist-slaps, the unresolved Israel-Palestinian conflict, including changing the practice of automatically providing political cover to Israel at the United Nations no matter what the resolution on the table may say.