The deal is done. For now. Washington and Tehran have shaken hands on a nuclear accord that gives each side something to tout to their domestic audiences. But the real question in Westminster and Foggy Bottom is not what is in the text. It is whether either side can actually stick to it. Hardliners in both capitals are sharpening their knives.
Let us start with what Iran gets. Sanctions relief. The promise of billions flowing back into a crippled economy. The regime can point to tangible benefits for ordinary Iranians, even if much of the cash will go to the Revolutionary Guards. Khamenei gets to claim he outfoxed the Great Satan without giving away the nuclear programme. But here is the rub. The Supreme Leader’s own base is restless. Hardliners see any engagement with the West as a poison. They will look for any excuse to scupper the deal, perhaps by allowing a minor violation that triggers a US response. They have done it before.
Now, what America gets. A lid on Iran’s breakout time. A commitment to intrusive inspections. And a diplomatic victory President Biden can point to as proof his engagement strategy works. But the White House faces a double problem. First, the Israelis and Saudis are apoplectic. They will lobby Congress to impose new sanctions, a measure that would kill the deal. Second, Republicans smell blood. They will paint this as a weaker version of the 2015 accord, a surrender to terrorism. The domestic political clock is ticking. If Trump returns, he will tear it up on day one. Even if Biden stays, the 2026 midterms could shift Congress to the right, making it impossible to suspend sanctions as agreed.
The true test will come in six months. Both sides must implement economically painful measures. Iran has to dismantle centrifuges. The US has to unfreeze assets and allow oil sales. Neither has a strong track record. Remember the 2015 JCPOA. It unravelled because the US unilaterally pulled out. This time, the fragility is embedded in the deal itself. There is no mechanism to punish a US withdrawal. There is no guarantee Iran will honour limits if the Guards decide to cheat.
Whitehall insiders are quietly terrified. British diplomats played a key role in brokering this, but they know the architecture is shaky. The PM will get a brief parliamentary debate, not a vote. That is deliberate. No MP wants to go on record approving a deal that could collapse in months.
Bottom line. This is a pause, not a settlement. Both sides gain temporary breathing room. But the structural pressures are immense. In Tehran, the mullahs fear a popular uprising if sanctions relief does not materialise fast. In Washington, the Senate hawks are drafting new sanctions already. The deal will survive only as long as it is convenient for both sets of hardliners. Do not bet on that being long.
Game on.
