The battle between the U.S. and Iran reignited after the administration's decision to depart from the Iranian nuclear deal and re-impose sanctions against the Islamic regime.
Iran's supreme leader Ayatollah Ali Khamenei said Saturday that negotiations with the United States are "useless" because it does not abide by agreements.
Iran has rejected talks with the USA, and Rouhani has accused the US of stoking an "economic war".
With the economic pressure, Trump said earlier this month that "at a certain point they're going to call me and say 'let's make a deal, ' and we'll make a deal".
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"To Iranian President Rouhani: NEVER, EVER THREATEN THE UNITED STATES AGAIN OR YOU WILL SUFFER CONSEQUENCES THE LIKES OF WHICH FEW THROUGHOUT HISTORY HAVE EVER SUFFERED BEFORE", Trump wrote.
In his latest salvo, Trump tweeted late on Sunday that hostile threats from Iran could bring dire consequences.
Colin Kahl, national security adviser to Vice President Joe Biden during the Obama administration, said Trump has "appeased" Russian Federation and "gone soft" on North Korea while abandoning the Iran nuclear deal without a backup plan.
It could have been an impulsive reaction to reports from Tehran quoting Rouhani as giving the U.S.an oft-repeated reminder that conflict with Iran would be "the mother of all wars".
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Ambassador Haley reminded the United Nations of how far they have come with the North since then. As for the broader global community, she said, "we ask you to hold tight as we go forward".
Trump earlier this year pulled the USA out of the worldwide deal meant to prevent Tehran from developing a nuclear weapon and ordered increased American sanctions, as well as threatening penalties for companies from other countries that continue to do business with Iran.
According to what the Iranian President Hassan Rowhani said: "If Iran could not export its oil, then the oil exports would stop in the whole region".
Wazne, the director of American Strategic Studies institute in Beirut, warned that "it needs just one mistake to have a major regional war". In them, he said Iran's 1979 revolution had borne "bitter fruit".
"He's venting", said Aaron David Miller, a former Middle East negotiator for presidents of both parties.
Rouhani accused the U.S. administration of seeking to overthrow the regime and divide Iran by imposing sanctions and economic pressure on it.
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