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Rubio Takes 2028 Lead on Kalshi as Markets Split Over GOP Successor

Rubio's surge reflects foreign-policy visibility, with Trump's praise reinforcing that momentum.

WASHINGTON, DC - MARCH 06: U.S. President Donald Trump (L) jokes with U.S. Secretary of State Marco Rubio during a roundtable discussion on college sports in the East Room of the White House on March 06, 2026 in Washington, DC. The Trump administration held the roundtable titled "Saving College Sports" with leaders from the Power Four conferences, media executives and former coaches. (Photo by Anna Moneymaker/Getty Images)
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Overview

  • Kalshi traders now price Rubio around 19–20% to win in 2028, edging past JD Vance and Gavin Newsom near 18%.
  • Polymarket shows a different frontrunner, with Vance near 21% and Rubio closer to 15–16%, highlighting cross-market divergence.
  • Sportsbooks continue to favor Vance, with DraftKings listing him around +376 and MGM placing him well ahead of Rubio.
  • Analysts tie Rubio’s rise to his role in high-profile actions, including Maduro’s capture and strikes on Iran, alongside fresh praise from Trump.
  • The Wall Street Journal reports Trump has been privately testing views on Rubio versus Vance, while neither has announced a 2028 campaign and GOP polling still shows Vance well ahead.