After months of anticipation, President Trump on Friday said his administration "cannot and will not" certify Iran's compliance with the Iran nuclear agreement to Congress, as he set out his plan for dealing with the Iranian regime.

The president, from the White House's Diplomatic Reception Room, announced the U.S. will remain in the Joint Comprehensive Plan of Action (JCPOA) reached under Obama in 2015, but he will not certify to Congress that Iran is in compliance under the Iran Nuclear Agreement Review Act (INARA) of 2015. Instead, he's looking to Congress to revise the INARA, and to ally nations in the JCPOA to come up with a new set of restrictions on Iran to coincide with the JCPOA. The president accused Iran of not living up to the "spirit" of the original deal.

"Based on the factual record that I have put forward, I am announcing today that we cannot and will not make this certification," Mr. Trump said. "We will not continue down a path whose predictable conclusion is more violence, more terror, and the very real threat of Iran's nuclear breakout. That is why I am directing my administration to work closely with Congress and our allies to address the deal's many serious flaws so that the Iranian regime can never threaten the world with nuclear weapons."

That move, the administration hopes, will prompt Congress to take additional legislative action to amend INARA by adding restrictions on Iran's activities related to ballistic missiles and other threats, and include trigger points that would immediately impose sanctions if Iran violates those restrictions. Under INARA, which was passed to put additional oversight on the 2015 JCPOA, there are roughly 90 days until the next deadline for Mr. Trump to certify Iran's compliance to Congress. Mr. Trump said key members of Congress are already working to amend the law, and consider eliminating sunset provisions on restrictions on Iran's nuclear program.

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"What is the purpose of a deal that at best only delays Iran's nuclear capability for a short period of time?" Mr. Trump said. "This, as president of the United States, is unacceptable."

The president's approach will also encourage other allies in the JCPOA to reach an agreement that would work in tandem with the JCPOA, instead of renegotiating or nixing the Iran deal as it stands.

But, if Congress and ally nations cannot reach an agreement, the Iran deal "will be terminated," Mr. Trump said, meaning the U.S. would back out of the deal.

The administration hopes it will be easier to negotiate a better deal by staying in the current JCPOA.

"I don't want to suggest to you that we give that a high chance of success, but there is an openness to talk about it," Tillerson told reporters on Thursday, referencing the chances of reaching an additional agreement with partner nations. "So where do we start. So that's one of the usefulness of having this INARA amendment. I think the second is that it does send that strong message to Iran that these requirements that the U.S. feels are necessary to ensure you never have nuclear weapons, these are with us, they are part of our relationship now and forevermore."

The U.S. is also looking to impose additional sanctions on the Islamic Revolutionary Guard Corps for its believed support of terrorist activities. The Treasury Department is looking to sanction specific individuals and entities believed to be connected with tangible support of terror.

"We will see what happens with Iran. We're very unhappy with Iran," Mr. Trump told reporters after making his announcement.

"They should have thanked Barack Obama for making that deal," Mr. Trump said, adding that Iran was "gone, economically gone" before Obama "infused" money into their economy.

Iran's president, Hassan Rouhani, said he wasn't surprised by the United States' actions.

"The Iranian nation will never kneel down, will never give up," Rouhani said on Iranian TV.

"America is now more than ever isolated when it comes to the JCPOA," he added.

Live updates of Trump's Iran deal statement below:

1:09 p.m. If agreement can't be reached, the deal "will be terminated," Trump says

Mr. Trump said he will back out of the JCPOA if Congress and U.S.' allies cannot come to an agreement.

1:07 p.m. Trump says U.S. "cannot and will not" certify compliance

Mr. Trump builds up the case for his decision not to certify to Congress that Iran is in compliance with the deal. Rather, Mr. Trump wants Congress to deal with the issue legislatively.

"Congress has already begun to work to address these problems," Mr. Trump said, adding that key members of Congress are already working to amend INARA.

1:05 p.m. Trump announces sanctions on Islamic Revolutionary Guard Corps

The Treasury Department, Mr. Trump said, will impose additional sanctions on the IRGC. The president also announced additional sanctions that would curb any ballistic missile action from Iran.

1:04 p.m. Iran isn't living up to the "spirit" of the deal

Trump says Iran isn't living up to the "spirit" of the 2015 deal.

1:03 p.m. Iran has violated the agreement multiple times, Trump says

The president says Iran has violated the 2015 agreement more than once.

12:59 p.m. The Iran deal was one of the worst deals ever, Trump says

Repeating what he has said on the campaign trail and after taking office, Mr. Trump criticized the 2015 Joint Comprehensive Plan of Agreement under Obama, better known as the Iran deal.

12:58 p.m. U.S. should not take Iran's "sinister" approach lightly, Trump says

Mr. Trump says Iran isn't going to alter its aggressive behavior.

12:56 p.m. Iran's aggression continues "to this day," Trump says

Mr. Trump says Iran provides support to a number of terrorist networks, threatening American troops and allies.

"The United States is far from the only target" of Iran's campaign of "bloodshed," he says.

12:54 p.m. Trump criticizes the historically "radical regime" of Iran

Iran, Mr. Trump said, has spread chaos and death all over the globe, giving a history lesson dating back to the Iran hostage crisis, as he makes his case for a stronger approach to Iran.

12:53 p.m. Trump steps up to the podium

President Trump says his first priority is to ensure the safety and security of the American people. So, he says, he's ordered a complete review of the "rogue" regime of Iran.

The U.S. strategy, Mr. Trump said, is "to make sure that Iran never, and I mean never, acquires a nuclear weapon."