The plan includes a diplomatic push to persuade U.S. allies to negotiate a new agreement that would effectively supplement the 2015 Iran nuclear deal.

To ratchet up pressure on Iran, the U.S. Treasury Department slapped new sanctions on elements of Iran’s Islamic Revolutionary Guard Corps, a military unit loyal to Supreme Leader Ayatollah Ali Khamenei.

Trump said the United States will remain a party to the the Joint Comprehensive Plan of Action, the 2015 deal that lifted sanctions on Iran in exchange for limits on the oil-rich nation’s nuclear program.

On Friday, Trump alleged that the nuclear deal has enriched Iran while it continues to test ballistic missiles, destabilize the Middle East and fund terrorism. Under the Iran Nuclear Agreement Review Act, the president must certify to Congress every 90 days that Iran is complying with the deal, and that the accord remains in the country’s national security interest.

“Based on the factual record I have put forward, I am announcing today that we cannot and will not make this certification,” 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,” he said.

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