Vice President JD Vance has been appointed to lead the negotiations on a final peace settlement with Iran, a high-stakes assignment that could have significant implications for his political future and the broader U.S. strategy in the Middle East. His role comes as the Trump administration seeks to resolve ongoing tensions stemming from the conflict with Iran, with particular focus on nuclear non-proliferation and control of the Strait of Hormuz.

President Donald Trump has set clear conditions for any agreement: Iran must be prevented from developing nuclear weapons, and the Strait of Hormuz must remain open and toll-free to international maritime traffic. While Iran has expressed resistance toward these demands, any failure to secure compliance could provide Vance with a defensible rationale for returning without a deal. However, the challenge lies in crafting an agreement that is both credible and comprehensive, avoiding mere superficial compliance that could invite sharp criticism from foreign policy experts on both sides of the aisle.

The negotiations carry additional political pressure for Vance, who is seen as a leading contender in the Republican primary race for the 2028 presidential nomination. Current polls place him alongside figures like Secretary of State Marco Rubio, Donald Trump Jr., and Florida Governor Ron DeSantis, each vying to succeed Trump as the party’s standard-bearer. Among Republican voters, particularly primary voters, there is substantial support—around 40 percent according to recent polling—for continuing the conflict until Iran concedes more, reflecting a hawkish stance that Vance will have to reckon with.

Demographically, older Republican voters tend to be more supportive of an assertive U.S. foreign policy and hold favorable views toward Israel and its Prime Minister Benjamin Netanyahu. According to a Pew Research survey from late 2025, these voters overwhelmingly endorse active American engagement abroad, a position that contrasts somewhat with the preferences of younger Republicans. Given the older median age of primary voters in 2024—at least 50 years—and demographic trends, Vance will need the backing of this older, pro-Israel electorate to secure the nomination. A peace plan perceived as weak or flawed by influential foreign policy analysts and allied communities could undermine his appeal among these voters.

Beyond the primary stage, Vance faces the task of appealing to moderate, independent swing voters in a general election. This group tends to prioritize domestic issues such as inflation, public safety, and stability over foreign policy complexities. Stabilizing the Strait of Hormuz and lowering energy prices would likely resonate positively with this constituency. Nonetheless, Iran’s recent statements suggesting intentions to assert control over the strait after negotiations adds uncertainty. Any ambiguity or instability in access to this critical maritime route could erode support among swing voters who favor predictable and orderly conditions.

Further complications could arise if Iran attempts to circumvent the terms of any agreement or uses threats to disrupt shipping through the strait. Such volatility could demand continued U.S. military involvement in the region, potentially undermining the perception of a successful peace deal brokered by Vance.

While Vice President Vance is widely regarded as intelligent, articulate, and capable of effective communication, his success ultimately depends on producing a peace agreement that satisfies a complex array of stakeholders: President Trump, hawkish Republicans, and moderate swing voters. Failure to do so could jeopardize his prospects both within the Republican primary and the broader 2028 presidential race, underscoring the high political risks entwined with these diplomatic efforts.