Hawks in the US Congress, particularly senators, have tried time and again to derail ongoing negotiations with Iran, aiming to maintain the multi-decade status quo of acrimony.
They’re not alone. Much as a lot of US Congressmen made their careers hawking on Iran, Iran’s parliament has no shortage of hawks who have played up the anti-US thing to great effect, and are hoping to derail the talks as well.
The rhetoric is almost a perfect mirror, with Iranian MPs insisting that everything the West has done proves they can’t be trusted, and they are trying to get themselves full oversight of the negotiations.
The House of Representatives in the US has tried the exact same thing, trying to dictate terms on the final pact (deliberately in ways Iran would never accept). The Iranian parliament has announced it intends to put an MP on the negotiating team too, suggesting they will be a thorn in the side of the actual negotiators at every round of talks going forward.