Iran's Foreign Ministry spokesman, Bahram Ghasemi, dismissed negotiations with Washington under sanctions and pressures, and underlined the need for the Iranian people and officials to resist against America's "illogical behaviour".

"Today, we should stand against the US illogical behaviour and we should help this integrity and unity to continue more strongly than the past. The US has no way out, but to change itself and its policies given the abnormal behavior it shows today in the world," Ghasemi said on Saturday.

"Iran will not hold negotiations under pressure, specially with a person who has not been disloyal to undertakings," he underlined, referring to the list of the US disloyalty, specially withdrawal from the 2015 nuclear deal and attempts to intensify sanctions against Iran.

Ghasemi advised US President Donald Trump to use a speciallized and impartial team to devise policies towards Iran, and said that the current team has a record of hostility towards Tehran and cooperated with certain anti-Iran terrorist groups (including the Mojahedin-e Khalq Organization MKO, also known as  MEK,  terrorist group).

Trump said on 30 July that he would “certainly meet” Iranian president Hassan Rouhani without preconditions, a move that was later rejected by Trump’s own administration.

Speaking during a joint news conference with Italy’s prime minister, Giuseppe Conte, Trump said he would meet Iran “anytime they want to”. “I’ll meet with anybody,” he said. “There’s nothing wrong with meeting.”

Asked whether he would set any preconditions, Trump was clear. “No preconditions, no. If they want to meet, I’ll meet any time they want,” he said. “Good for the country, good for them, good for us and good for the world. No preconditions. If they want to meet, I’ll meet.”

After the comment, US Secretary of State Mike Pompeo appeared to contradict Trump, listing preconditions that had to be met first.

He told CNBC that “if the Iranians demonstrate a commitment to make fundamental changes in how they treat their own people, reduce their malign behaviour, can agree that it’s worthwhile to enter in a nuclear agreement that actually prevents proliferation, then the president said he’s prepared to sit down and have a conversation with him".

Also, Garrett Marquis, a spokesman for the president’s National Security Council, later said in a statement the US would not lift any sanctions or re-establish diplomatic and commercial relations until “there are tangible, demonstrated, and sustained shifts in Tehran’s policies”.

“Until then,” he said, “the sting of sanctions will only grow more painful if the regime does not change course.”

Hamid Aboutalebi, one of Rouhani’s advisers, set his own conditions for any meeting with Trump, saying “respect for the great nation of Iran”, returning to the nuclear deal and a reduction in hostilities were needed first.

Also, Commander of the Islamic Revolution Guards Corps (IRGC) Major General Mohammad Ali Jafari dismissed Trump's call for negotiations with Tehran, reminding him that Iran is totally different from North Korea.

"Mr. Trump! Iran is not North Korea to give a positive response to your demand for a meeting. You should know that the Iranian nation…will never allow their officials to negotiate and meet with the Great Satan," Jafari wrote in a letter.

He described Trump as unskilled  in politics, and said, "The former US presidents who were either military men or politicians knew much better than you or they learned that Iran and the Iranian people cannot be threatened and rather grow united and single-hearted against any threat and pressure by foreigners."

"You will take this wish to the grave to see the day when the Islamic Republic of Iran demands for a meeting with you or is allowed by the nation to meet you. You will never see that day," General Jafari said, addressing Trump.

He underlined that the next US presidents will not see another day when the Iranian officials sit to the negotiating table with them either.

General Jafari said that the Iranian nation will resist until it achieves final victory and inflicts ultimate defeat on the arrogant powers by withstanding the cruel and inhumane sanctions thanks to the divine promises, huge internal resources and the leadership of a wise leader.

Trump announced on May 8 that Washington would no longer remain part of the Joint Comprehensive Plan of Action (JCPOA) and promised to re-impose the highest level of economic sanctions against Iran.