Policy Explainer: What Was the Iran Nuclear Deal — and What Happened to It?
To understand how we got here, you have to understand a deal that was made, kept, and then torn up — and what that decision ultimately cost us.
The short version: The United States and its allies once had a diplomatic agreement that kept Iran from developing a nuclear weapon. It was working. And then it wasn’t — because we walked away from it.
Here’s the background.
For years, Iran had been developing a nuclear program that alarmed the international community. A nuclear-armed Iran would be a destabilizing force in an already volatile region — a threat not just to its neighbors, but to global security.
Rather than going to war, the Obama administration chose diplomacy. In 2015, after years of painstaking negotiations, the United States, the United Kingdom, France, Germany, Russia, and China reached an agreement with Iran known as the Joint Comprehensive Plan of Action — or JCPOA.
What did the deal actually do?
In exchange for relief from crippling economic sanctions, Iran agreed to dramatically scale back its nuclear program. It reduced its stockpile of enriched uranium by 98%. It dismantled two-thirds of its centrifuges. It accepted the most rigorous international inspection regime ever negotiated. Independent inspectors verified that Iran was complying.
When President Obama left office in January 2017, Iran was estimated to be at least a year away from having enough material to build a nuclear weapon.
Then what happened?
In 2018, President Trump withdrew the United States from the deal, calling it "the worst deal ever negotiated." He reimposed sweeping sanctions on Iran and launched what his administration called a "maximum pressure" campaign — betting that economic pain would force Iran to negotiate an even better deal.
A new agreement was never reached. Instead, Iran began rebuilding its nuclear program. By the time the current conflict began, Iran was estimated to be just weeks away from having enough enriched uranium for a nuclear weapon — compared to a year away when we left the deal.
So where does that leave us?
The administration argues that the 'Epic Fury' strikes have set Iran's nuclear program back. But with at least 13 American service members already lost and over 300 wounded, the human cost is mounting.
As Senator Adam Schiff put it on NBC's Meet the Press on March 15th: we had a deal that was working. We walked away from it. And now we are at war.
What would a new deal even look like?
That is the question the administration cannot answer. President Trump told NBC he is open to a deal but "the terms aren't good enough yet" — without specifying what terms he is looking for. Without a clear objective, it is very difficult to know when — or whether — this war ends.
Leading Ladies Vote believes in humane, thoughtful foreign policy that prioritizes the safety of American service members, the stability of the global economy, and the security of our planet. Diplomacy is not weakness. It is wisdom.
Sources:
What Is the Iran Nuclear Deal?
2026 Iran War Overview
Center for American Progress: The $25 Billion Price Tag of the Iran War
Official Senate Press Release: Sen. Schiff on NBC’s Meet the Press
https://www.youtube.com/watch?v=Ho2Dv37jsOo