U.S. Vice President JD Vance said Wednesday he believes that progress is being made in talks with Iran to end the war, despite President Donald Trump rejecting Tehran’s latest proposal, stressing that Washington’s main objective is to ensure Iran never acquires a nuclear weapon.

"I spent a good amount of time on the phone with both Jared Kushner and Steve Witkoff this morning and a number of our friends in the Arab world this morning. I think that we are making progress," Vance told reporters when asked if the U.S. is still engaging with the Iranians after Trump called Tehran's response "unacceptable."

"The fundamental question is, do we make enough progress that we satisfy the president's red line? And the red line is very simple. He needs to feel confident that we've put a number of protections in place such that Iran will never have a nuclear weapon," Vance said.

"I thought we made some progress in Pakistan, but we've made more since then," he said.

"The President has set us off on the diplomatic pathway for now, and that's what I'm focused on," he added.