"Thank God my president turned his back on that very risky nuclear deal with Iran".
"We are not talking about regime change, we are talking about the regime change". He promised to reinstate the former anti-Iranian sanctions and impose tighter ones.
While pragmatist President Hassan Rouhani's government has tried to stop the currency slide with a combination of threats and persuasion, many Iranians remain unconvinced.
Trump also said he would reinstate USA nuclear sanctions on Iran and impose "the highest level" of economic bans on the Islamic Republic.
Iran's Supreme Leader has accused the United States and allies of fomenting unrest in Iran.
Bazaar merchants, mostly loyal to the leadership since the 1979 Islamic Revolution, are angry at what they see as the government's muddled response to the crisis, which they said had sent prices soaring and made trading nearly impossible.
As Washington continues to threaten its allies into halting imports of Iranian oil, Iranian president Hassan Rouhani has recently vowed to bring the U.S. "to its knees".
Protests have surfaced in Iran as economic difficulties mount in the wake of Trump's withdrawal from the nuclear deal and the subsequent pullout of companies anxious of facing USA sanctions.
Trump names Indian-American to key role in appointment of SC justice
Bob Casey Jr. (D) said Trump is wrongly limiting himself to a list of 25 names released by the White House. In a generic ballot for the House, Democrats held a 50 percent to 41 percent lead over Republicans.
He further said, "The goal of the current economic pressures is to make people fed up, but with divine power, we will increase our bond with the people day by day, and by preserving our coherence, we will strengthen the faithful, motivated and proactive youth".
Gingrich stressed he did not speak for the Trump administration, but added: "It seems to me there would be a rather happy celebration should regime change occur".
Earlier this month, Head of the Atomic Energy Organization of Iran Ali Akbar Salehi expressed a downbeat view of chances of saving the JCPOA, saying the (unofficial) proposals that Europeans have made fall below Iran's expectations.
But Trump may be in no hurry to embark on negotiations that might bolster Iranian clerical leaders.
Meanwhile, Iranian government leaders have continued calling for Iranian unity in the face of USA attacks.
While more pragmatic elements in Iran have indicated an interest in dialogue with America and a diplomatic solution to the standoff, Khamenei has resisted direct negotiations, partly because of internal power politics.
"The enemy's plot is creation of rift and division between the (Islamic) Establishment and nation, but such a ploy reveals their stupidity, because they are not aware that the Islamic Republic's Establishment is nothing different from the Iranian nation, as these two are inseparable", Ayatollah Khamenei, Commander-in-Chief of the Iranian Armed Forces, said in a graduation ceremony of cadets at Imam Hussein (AS) University in Tehran on Saturday, Tasnim reported.