'JD or Marco?’: Iran war raises 2028 stakes as Trump weighs Vance vs. Rubio

The war in Iran has become a defining crisis for President Donald Trump’s second term, creating a high-stakes environment for his two most prominent potential successors. Vice President JD Vance and Secretary of State Marco Rubio find themselves at the center of critical negotiations to end the conflict, even as the Republican Party begins to contemplate its path forward in a post-Trump era.

The president has been privately weighing the merits of both men, reportedly asking advisors and allies, "JD or Marco?" regarding the 2028 ticket. With Trump term-limited and unable to run again, the outcome of the current military operation—now in its fifth week—is expected to significantly shape the political trajectories of both the Vice President and the Secretary of State.

JD Vance, 41, has maintained a characteristically cautious stance. A former Marine with a history of skepticism toward foreign entanglements, Vance has aligned himself with the "anti-war" wing of the MAGA base. While he publicly supports the administration’s goals of dismantling Iran’s nuclear program, his measured rhetoric suggests a desire to avoid a prolonged quagmire, a position that resonates with many of Trump's core supporters.

In contrast, Marco Rubio, 54, has fully embraced the role of a "hawk." Serving as both Secretary of State and National Security Adviser, Rubio has emerged as the administration’s most aggressive defender. He views a decisive military victory as a way to project American strength and stability. If the war ends swiftly and in favor of the U.S., Rubio’s "steady hand" approach could see a massive boost in his 2028 prospects.

The domestic fallout of the conflict is already being felt at the polls. Recent data shows President Trump’s approval rating has dipped to 36%, a low point driven by surging fuel costs and public fatigue over the five-week campaign. This decline has heightened the pressure on the White House to find a resolution that satisfies both national security requirements and a frustrated electorate.

Within the party, the competition between the two men is already visible in grassroots polling. At the recent CPAC gathering, Vance secured a commanding 53% of the straw poll for the 2028 nomination. However, Rubio showed the most significant growth, jumping from a mere 3% last year to 35%, suggesting that his high-profile role in the Iran crisis is winning over previously skeptical conservatives.

Despite the perceived rivalry, the White House maintains a front of total unity. Spokesman Steven Cheung dismissed reports of a rift or a "succession contest" as media speculation, asserting that the administration remains focused on its mission. Meanwhile, Rubio has indicated he would be willing to serve as Vance’s running mate, and Trump has even floated the idea of the two men running on a joint ticket.

Ultimately, the resolution of the war will likely act as the final arbiter. A successful conclusion would validate Rubio’s traditional "strength-through-force" doctrine, while a protracted and costly struggle would provide Vance with the political space to argue for the restraint he has long advocated. For now, the Republican establishment remains in a "wait-and-see" mode, watching closely for any sign of which lieutenant the president will eventually favor.