"I wouldn't just say that things went wrong. I also think things went right. We made a lot of progress," Vance told Fox News.
Iran must agree to hand over its enriched uranium and commit to refraining from developing nuclear weapons, Vance added.
"We must have the enriched material out of Iran. We must have their conclusive commitment to not develop a nuclear weapon," Vance noted.
The course of the peace talks between the United States and Iran will fundamentally change if Tehran refuses to open the Strait of Hormuz, US Vice President JD Vance said.
"We haven't seen that full reopening, so our expectation is that the Iranians are going to continue to make progress to opening the Straits of Hormuz, and if they don't, it's going to fundamentally change the negotiation that we have with them," Vance said.