President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE tweeted Sunday that military engagement with the U.S. would mean “the official end of Iran” amid rising tensions between the two nations.

If Iran wants to fight, that will be the official end of Iran. Never threaten the United States again! — Donald J. Trump (@realDonaldTrump) May 19, 2019

In recent weeks, the U.S. has deployed a carrier strike group to the Persian Gulf in response to what national security adviser John Bolton John BoltonMaximum pressure is keeping US troops in Iraq and Syria Woodward book trails Bolton, Mary Trump in first-week sales Ex-NSC official alleges 'unprecedented' intervention by White House aides in Bolton book review MORE said were aggressive moves by Iran in the region.

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On Wednesday, the State Department pulled all nonemergency personnel from Iraq, citing possible threats from sectarian militias with ties to Iran.

Meanwhile, Iran has announced it will back out of some of its commitments under the 2015 nuclear deal, while the U.S. has designated Iran’s Revolutionary Guard a terrorist organization, the first time the designation has been applied to a governmental entity. In response, Iran applied the same designation to U.S. troops in the Middle East.

This weekend, a Saudi official warned that the nation would defend itself “with all force and determination” in the wake of attacks on four oil tankers, two of which were Saudi, near the coast of the United Arab Emirates and an attack on a Saudi pipeline, for which Tehran-allied Yemeni rebels took credit.

Lawmakers have increasingly accused the administration of leaving them in the dark on the situation with Iran, with Democrats in particular demanding briefings on the issue.

Trump has used similar rhetoric against North Korea and leader Kim Jong Un Kim Jong UnSatellite images indicate North Korea preparing for massive military parade South Korea warns of underwater missile test launch by North Korea Trump says he didn't share classified information following Woodward book MORE, saying in August 2017 that North Korea “best not make any more threats to the United States” or the nation would be “met with fire and fury like the world has never seen.”

Asked Thursday about the possibility of war with Iran, Trump responded, "I hope not."