The bottom line: If Iranian officials chose to produce enough fissile material for a nuclear weapon, it would take at least one year; without the deal, it would have taken just two or three months.
In recent months, Khamenei has sharpened his criticism.
The White House and the State Department oppose any new sanctions against Iran.
London - Iranian President Hassan Rouhani threatened to withdraw from the Joint Comprehensive Plan of Action announced in Vienna past year, if the United States failed to meet its commitments. The deal ensures that Israel does not have to live with the threat of a nuclear Iran in its backyard.
"We are seeing how Iran continues to push the limits", Corker said.
The historic Iran deal signed a year ago has succeeded in rolling back Tehran's nuclear programme and avoiding further conflict, US President Barack Obama said today. "The United States and our negotiating partners have also fully implemented our commitments to lift nuclear-related sanctions, and we will continue to uphold our commitments as long as Iran continues to abide by the deal". "We shouldn't be paying them [Iranians] for something they shouldn't be producing in the first place", argued David Albright, president of the Institute for Science and International Security, a nonpartisan anti-proliferation think tank.
The U.S. State Department doesn't agree, saying: "We have no information to indicate that Iran has procured any materials in violation of the JCPOA". The measure would restate US policy to deny the Iranian government and banks access to USA dollars.
On Wednesday, US Secretary of State John Kerry made similar statements.
Over the past decade, some of the world's top banks - including HSBC and Deutsche Bank - have paid billions of dollars in fines for Iran-related activities.
The European Union acknowledges that clarity regarding the lifting of sanctions is key to allow a full reengagement of European banks and businesses in Iran. Because for six months you found every reason to say no. "We feel like this is an appropriate way of pushing back". Some members of Congress are seeking to block the Boeing sale because of Iran's continued support of Bashar al-Assad's government in Syria.
"She is much more hawkish-sounding on Iran than Obama is", she said. The Obama administration has promised to veto any bill that undermines the nuclear agreement.
Under the deal, Iran promised it would cut back its nuclear program, including dismantling two-thirds of its key nuclear machinery for the next 10 years, reducing its uranium stockpile by 98 percent for the next 15 years, and submitting to global monitoring and inspections.
The proposal introduced by the lawmakers seeks to expand sanctions against Iran's ballistic missile projects, sanction transfers of conventional weapons to or from Iran and extend the Iran Sanctions Act which expires by the end of 2016, according to Reuters. The White House has said removing the country's surplus heavy water denies Tehran access to a material that may be stored for potential nuclear weapons production. "The United States must reserve the right to hold Iran accountable for its actions, and that is exactly what this legislation will do, imposing stricter sanctions tied to the specific actions outside of the nuclear portfolio".
Just last week, Walid Phares, one of the Republican's top foreign policy advisers, suggested Trump would not scrap the Iran agreement - no matter how many times the candidate vows to do the exact opposite. While GOP presumptive nominee Donald Trump regularly rails against the deal on the campaign trail, worldwide challenges like global terror, China and Russian Federation have gotten more attention and had a greater impact on the political environment.