Iranian Foreign Minister Abbas Araghchi met Qatari mediators in Doha on Tuesday night and received US feedback on a proposed seven-day trust-building plan, which he will discuss in Tehran on Wednesday, an official briefed on the talks told Reuters. The main disagreement is over the sequencing of the plan, which aims to build trust and return to an enhanced version of a US-Iran memorandum of understanding signed in June, the official said. President Donald Trump said on Tuesday he does not know if Iran is going to "give up yet" but cast the country as doing "very poorly" in its war with the US. "I don't know if they are going to give up yet but they'll give up," Trump told reporters. "They are doing very poorly," he added. A US blockade has cut Iran's financial lifeline - oil exports, and economic costs of the war have made life tougher for Iranians. Iran's president told the UN General Assembly last week that Tehran would never surrender to US pressure. The rise in oil prices due to the war has also become a major issue for Trump's Republican Party heading into the November US midterm elections. The war has led to the blockade of the Strait of Hormuz, which carried a fifth of global supplies of crude oil and LNG before the conflict. Trump has offered shifting goals and timelines for the Iran war that began on February 28 when the US and Israel attacked Iran and Tehran responded with its own strikes on Israel and Gulf states. US-Israeli strikes on Iran and Israeli attacks on Lebanon have killed thousands and displaced millions.