Washington, April 12 (NationPress) President Donald Trump has been actively engaged in critical nuclear negotiations with Iran, endorsing a “final and best offer” to Tehran following the breakdown of talks in Islamabad, according to Vice President J. D. Vance.

“We depart with a straightforward proposition, a method of understanding that constitutes our final and best offer. It remains to be seen if the Iranian authorities accept it,” Vance remarked to journalists after a marathon 21-hour discussion.

The Vice President highlighted Trump's personal involvement, noting ongoing communication between the negotiating team and the White House. “We were in constant contact with the President. I cannot specify how many times we communicated—perhaps half a dozen to a dozen times during the last 21 hours,” he stated.

He further explained that the President had directed the negotiators to engage in discussions with integrity but emphasized adherence to strict limits.

“The President instructed us to approach this with sincerity and make every effort to secure a deal. That’s precisely what we did,” Vance affirmed.

Despite their intensive efforts, the talks were unable to reconcile significant differences concerning Iran’s nuclear agenda. “We have been at it for 21 hours… we engaged in numerous substantial discussions with the Iranians. That's the positive aspect. The negative aspect is that we did not reach an agreement,” Vance added.

Washington, he noted, had clearly defined its negotiation parameters. “We have unequivocally articulated our red lines… and the Iranians opted not to accept our conditions,” Vance continued.

At the heart of the stalemate lies the U.S. demand for a long-term assurance that Iran will refrain from pursuing nuclear weapon capabilities. “We need an explicit commitment that they will not seek a nuclear weapon nor the means to rapidly acquire one,” he emphasized.

Vance made it clear that Washington is looking for enduring assurances, not just fleeting promises. “Are we witnessing a fundamental commitment from the Iranians to refrain from developing a nuclear weapon? Not only now, or in two years, but over the long haul? We have yet to observe that,” he remarked.

He also pointed out the extensive national security collaboration underpinning the negotiations, mentioning that the team remained connected with senior officials throughout the process.

“We obviously communicated with the entire national security team… as we were negotiating sincerely,” Vance noted.

While he refrained from revealing specific obstacles, Vance asserted that the U.S. side had demonstrated considerable flexibility. “I believe we were quite accommodating. However, regrettably, we couldn’t make any progress,” he lamented.