WASHINGTON -- President Trump was eager to declare Iran in breach of the nuclear deal but was talked out of it by national security aides who rushed to the Oval Office to persuade him as a midnight deadline approached, administration officials say.

Mr. Trump agreed Monday night to let the issue go, but only for a few more months -- and only after last-minute changes to distance Mr. Trump further from the deal.

Rather than say, as planned, that Iran was living up to its end of the deal, Mr. Trump's aides found a way to let the deal continue for now without technically confirming that Iran is complying. The administration followed up the announcement with new, non-nuclear sanctions on Iranians on Tuesday to show Mr. Trump is indeed serious about confronting Tehran. It slapped new economic sanctions on 18 Iranian groups and individuals.

The compromise, relayed to Congress in the final few hours before the deadline, lets Iran continue enjoying relief -- for now -- from nuclear sanctions lifted as part of the 2015 deal. It also gives Mr. Trump some cover to declare publicly that Iran is violating "the spirit" of the deal, preserving a potent argument should he ultimately decide to exit the pact.

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The deadline comes up again in three months. Given Mr. Trump's strong reluctance to certify Iran's compliance, it's highly unlikely he will agree to do it again, officials and others familiar with Mr. Trump's Iran policy said. The individuals weren't authorized to comment publicly and requested anonymity.

Coupled with the new sanctions, the move raised optimism among critics of the deal that Mr. Trump's broader Iran review, expected to conclude in the next few weeks, will mark a major shift in the U.S. approach to the Islamic Republic.

"What that really foreshadows is once the policy review is done, we're going to see a massive increase in pressure -- not just sanctions pressure but using all instruments of American power," said Mark Dubowitz, who runs the hawkish Foundation for Defense of Democracies and has advised the administration on Iran.

The drama came to a head Monday when Mr. Trump abruptly put the certification on hold, even as his administration had already started announcing it.

Top advisers scurried to the White House, with Secretary of State Rex Tillerson, Defense Secretary Jim Mattis and national security adviser H.R. McMaster urging Mr. Trump to preserve the status quo -- at least until the Iran review is completed and a new U.S policy ready to be unveiled. Steve Bannon, Mr. Trump's chief strategist and an avowed critic of the deal, and CIA Director Mike Pompeo urged Mr. Trump to change course and say Iran wasn't complying, several individuals briefed on the meeting said.

The argument that ultimately won out: Letting Iran keeps its sanctions relief -- thus fulfilling U.S. obligations under the deal -- without using the word "complying." Mr. Trump and other critics have pointed to minor infractions by Tehran to say it's in violation of restrictions on its nuclear development, although the International Atomic Energy Agency that monitors the deal says Iran is broadly complying.

The compromise led to a last-minute shift in the language Mr. Trump's administration employed to describe its actions on the Iran deal.

In an original version of a public statement, prepared by the administration in advance of Monday's announcement and obtained by The Associated Press, the State Department planned to say the U.S. "is certifying Iran's continued compliance with the JCPOA" -- an acronym for the nuclear deal -- "while noting Iran's continued malign activities outside the nuclear issue."

In the final language sent to Congress and echoed later by the State Department, the administration said only that it was certifying that "the conditions ... are met" when it comes to a separate, U.S. law put in place to monitor the nuclear deal.

In practice, the compromise accomplishes the same as what Mr. Trump's earlier, April certification did: Iran continues to receive relief from nuclear sanctions in exchange for rolling back its nuclear program. But the shift in rhetoric helps bolster Mr. Trump's position that Iran is defying a deal that's bad to begin with and must be corrected.

"The administration is continuing to conduct a full review of U.S. policy toward Iran," said State Department spokeswoman Heather Nauert. "During the course of this review, the United States will continue to aggressively counter Iran's malign activities in the region."

The latest attempt to clamp down on Iran's military financing, the new sanctions hit 18 Iranian individuals and groups that range from an Iranian-based company accused of aiding the country's drone program to a Turkey-based provider of naval equipment and a China-based network that helped secure electronics for Tehran.

Iran has bristled at new U.S. sanctions, arguing that they, too, violate the spirit of the deal. On Tuesday, Iranian lawmakers agreed to fast-track an anti-American bill meant to confront what Iran calls "adventurist and terrorist" U.S. actions in the region.

Iran's top diplomat Javad Zarif said the new sanctions are poisoning already strained relations between the two countries, CBS News' Margaret Brennan reports.

The Iran deal, reached by former President Barack Obama and other world leaders, doesn't address global concerns about non-nuclear activities, but also doesn't prevent the U.S. and others from punishing Iran for those activities.

"This administration will continue to aggressively target Iran's malign activity, including their ongoing state support of terrorism, ballistic missile program, and human rights abuses," said Treasury Secretary Steven Mnuchin.

Zarif places blame on U.S. allies like Saudi Arabia for supporting terrorism.

"These are the countries that are producing terrorists for you," he told CBS News' Brennan. "And the United States is going after Iran? I don't know why."

Another irritant: the travel ban on six majority Muslim countries including Iran.

"So what the United States has done against the Iranian people over the past several months have been really repugnant," Zarif said.

When asked if Mr. Trump should show goodwill, Zarif replied, "I certainly think it is up to the U.S. government to stop sending all these hostile signals, not to the Iranian government only, but to the entire Iranian nation, both in Iran and abroad."