Their assessments also broke with other assertions by Trump, including on the threat posed by Russian Federation to US elections, the threat the Islamic State militant group poses in Syria, where he plans to withdraw USA troops, and North Korea's commitment to denuclearize.
U.S. President Donald Trump defended his handling of perilous world threats on Wednesday.
While the two countries seek to expand their global reach, Director of National Intelligence Dan Coats said, some American allies are pulling away from Washington in reaction to changing USA policies on security and trade.
Conclusions of the annual 42-page "Worldwide Threat Assessment" from the national intelligence stressed that North Korea is unlikely to give up its nuclear stockpiles and that Iran is not, for now, taking steps necessary to make a bomb.
Trump, in a remarkable rebuke that was reminiscent of his past criticisms of law enforcement officials, said the intel chiefs were "extremely passive and naive" on the matter.
"ISIS will continue to be a threat to the United States, and we're going to have to continue ... to keep our eyes on that and our interest in the realization that this terrorism threat is going to continue for some time".
The news comes as the USA plans to pull troops out of Syria. She added that they still command "thousands of fighters in Iraq and Syria".
Trump has given the Pentagon about four months to withdraw USA troops from Syria, backtracking from his abrupt December order for a pullout within 30 days. "Dems put us in a bad place - but now good!" "We've taken back the land and now it's time for our troops to come back home".
Trump's administration has been consistently hawkish on Iran.
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But in the intelligence report, the view on North Korea was that its leaders continue to "view nuclear arms as critical to regime survival".
Those threats also extend to the U.S. military and critical infrastructure.
FILE - CIA Director Gina Haspel testifies before the Senate Intelligence Committee on Capitol Hill in Washington, Jan. 29, 2019.
Trump spent yesterday morning in a defensive twitter storm about his foreign policy initiatives after Coats contradicted his claim of success after his summit with Kim Jong-Un.
Trump has invested heavily in improving relations with North Korea in hopes of getting Pyongyang to abandon its nuclear ambitions. There are no rockets.
The intelligence chief said despite the North's promises to get rid of its nuclear weapons, the rogue nation is unlikely to dismantle its arsenal.
He also said some USA allies are seeking more independence, responding to their perceptions of changing policies on security and trade and "are becoming more open" to new partnerships.
Leaders of the United States intelligence community told a Senate committee on January 29 that the Persian Gulf nation is "not now undertaking the key nuclear weapons-development activities", which Trump claimed is false. Iran is in financial chaos now because of the sanctions and Iran Deal termination.
"We'll do it someplace in Asia", he said.
On Tuesday, top intelligence officials described a different Iran than the president has, one that is not now trying to make a nuclear bomb and appears to be complying with a 2015 nuclear agreement, even after Trump promised past year to withdraw from it.