The president is reportedly frustrated with national security adviser John Bolton's overconfidence about toppling Venezuela's President Nicolás Maduro.
A spokesperson for Iran's national security body said John Bolton's announcement was "mostly meant to draw attention to himself."
"War with Iran is playing with fire, and it will burn all, and not just Iran," said Iranian lawmaker Alaeddin Boroujerdi.
"We are fully prepared to respond to any attack, whether by proxy, the Islamic Revolutionary Guard Corps, or regular Iranian forces," national security adviser John Bolton said.
"Tell the Bolivarian government and Nicolas Maduro what is necessary to be changed," the Venezuelan leader said.
National Security Adviser John Bolton accused a CNN host of picking a fight after he was pressed about a scheduled call with the Russians he mentioned just moments before on Fox News.
"They have all shown an interest in dragging the United States into a conflict," Javad Zarif told Fox News Sunday. "I do not believe that President Trump wants to do that. I believe that President Trump ran on a campaign promise of not bringing the United States into another war."
The group of 12 politicians asked Donald Trump to use Washington's influence within the Organization of American States to prevent Bolivian President Evo Morales from running for another term.
"This is a catastrophic departure from the very basis of international law," former Swedish Prime Minister Carl Bildt said in response to President Donald Trump's call to recognize Israel's sovereignty over the Golan Heights.
Bolton suggested that the Trump administration was ready to embrace a modern version of the Monroe Doctrine.
National Security Adviser John Bolton insisted President Donald Trump's Hanoi visit was somehow a "success" despite acknowledging that no denuclearization agreement was made and North Korea remains a threat to global stability.
Last month, President Donald Trump's national security adviser was spotted with a notepad that said, "5,000 troops to Colombia."
The U.S. listed the MEK, an Iranian opposition group pushing for regime change, as a terrorist organization until 2012.
White House national security adviser John Bolton had warned Ayatollah Ali Khamenei, "I don't think you'll have many more anniversaries left to enjoy."
"It definitely rattled people," a former senior U.S. administration official told The Wall Street Journal. "People were shocked. It was mind-boggling how cavalier they were about hitting Iran."
"John Bolton has been assigned with the job organizing my assassination," said the Venezuelan president, providing no evidence.
Trump has effectively raised taxes on most Americans.
National security adviser John Bolton first said there was no reason to listen to the tapes because he did not speak Arabic; this week he offered another reason.
"These tyrants fancy themselves strongmen and revolutionaries, icon and luminaries," Bolton said in his speech.
Despite the national security adviser's claims, many experts are concerned that Russia has persisted in its attempts to hack the upcoming U.S. midterms.
"That, I have not heard about," President Donald Trump told reporters on Thursday after he was asked about an alleged shouting match between White House Chief of Staff John Kelly and National Security Adviser John Bolton.